i use autopost in itemtemplate, but it do not update the result column immediately
i guess to use multiplier_dropdownlist_SelectedIndexChanged to update gridview, but
there is no gridview.update(); how to update displayed result immediately
[Solved]
protected void Timer1_Tick(object sender, EventArgs e)
{
for (int i = 0; i < Calculator_GridView.Rows.Count; i++)
{
string serial_no = Calculator_GridView.Rows[i].Cells[1].Text;
string a1_textbox = Calculator_GridView.Rows[i].Cells[2].Text;
string b1_textbox = Calculator_GridView.Rows[i].Cells[3].Text;
DropDownList mp_dropdown = (DropDownList)Calculator_GridView.Rows[i].Cells[4].Controls[1];
//TextBox Result_textbox = (TextBox)Calculator_GridView.Rows[e.RowIndex].Cells[5].Controls[0];
string executestring = "";
executestring = "Update cal set a1=" + a1_textbox;
executestring = executestring + ", b1=" + b1_textbox;
executestring = executestring + ", mp=" + mp_dropdown.SelectedValue;
executestring = executestring + ", result=" + (Convert.ToDouble(mp_dropdown.SelectedValue) * Convert.ToDouble(b1_textbox)).ToString();
executestring = executestring + " where [識別碼]=" + serial_no;
ExecuteDatabase(executestring);
}
string connstr = #"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|/db1.mdb";
OleDbConnection conn = new OleDbConnection(connstr);
conn.ConnectionString = connstr;
try
{
conn.Open();
}
catch (Exception ex)
{
conn.Close();
}
OleDbCommand get_info_cmd = null;
get_info_cmd = new OleDbCommand("SELECT [識別碼], [a1], [b1], [result], [mp] FROM [cal]", conn);
OleDbDataReader get_info_Reader = get_info_cmd.ExecuteReader();
store.Columns.Add(new DataColumn("識別碼", typeof(int)));
store.Columns.Add(new DataColumn("a1", typeof(double)));
store.Columns.Add(new DataColumn("b1", typeof(double)));
store.Columns.Add(new DataColumn("mp", typeof(double)));
store.Columns.Add(new DataColumn("result", typeof(double)));
DataRow dr;
try
{
while (get_info_Reader.Read())
{
dr = store.NewRow();
dr[0] = get_info_Reader["識別碼"].ToString();
dr[1] = get_info_Reader["a1"].ToString();
dr[2] = get_info_Reader["b1"].ToString();
dr[3] = get_info_Reader["mp"].ToString();
dr[4] = (Convert.ToDouble(get_info_Reader["b1"].ToString()) * Convert.ToDouble(get_info_Reader["mp"].ToString())).ToString();
store.Rows.Add(dr);
}
}
catch (Exception ex)
{
Error_Label.Text = Error_Label.Text + ex.ToString();
conn.Close();
}
finally
{
get_info_cmd.Dispose();
get_info_Reader.Close();
conn.Close();
}
storeview = new DataView(store);
Calculator_GridView.Font.Size = new FontUnit(10);
Calculator_GridView.DataSourceID = "";
Calculator_GridView.DataSource = storeview;
Calculator_GridView.DataBind();
}
keep the gridview inside an ajax update panel.after the content template of ajax control pane use a timer control which will periodically update ur gridview automatically
Related
I coded this for my code what im trying to do is for each of the accounts made in a database it adds it to the datagridviewi tried this code but all the comums are empty?
public DataTable GetResultsTable(string Username)
{
using (SqlDatabaseClient client = SqlDatabaseManager.GetClient())
{
DataRow row = client.ExecuteQueryRow("SELECT * FROM users WHERE username = '" + Username + "'");
DataTable table = new DataTable();
table.Columns.Add("Username".ToString());
table.Columns.Add("Motto".ToString());
table.Columns.Add("Email".ToString());
table.Columns.Add("Homeroom".ToString());
table.Columns.Add("Health".ToString());
table.Columns.Add("Energy".ToString());
table.Columns.Add("Age".ToString());
DataRow dr = table.NewRow();
dr["Username"] = "" + row["username"] + "";
dr["Motto"] = "" + row["motto"] + "";
dr["Email"] = "" + row["mail"] + "";
dr["Homeroom"] = "" + row["home_room"] + "";
dr["Health"] = "" + row["health"] + "";
dr["Energy"] = "" + row["energy"] + "";
dr["Age"] = "" + row["age"] + "";
table.Rows.Add(dr);
return table;
}
}
public frmMain()
{
this.InitializeComponent();
this.SetupBackstageContent();
ribbonControl1.SelectedRibbonTabItem = ribbonTabItem1;
ribbonTabItem2.Text = "&USER CONTROL";
ribbonTabItem4.Text = "&ADD ONS";
SqlDatabaseManager.Initialize();
using (SqlDatabaseClient client = SqlDatabaseManager.GetClient())
foreach (DataRow row2 in client.ExecuteQueryTable("SELECT * FROM users").Rows)
{
dataGridView1.DataSource = GetResultsTable((string)row2["username"]);
}
}
Your way is wrong,if you want fill dataGrid with all user records just consider this code:
using (SqlConnection conn = new SqlConnection("your connection string"))
{
SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM users", conn);
DataSet ds = new DataSet();
da.Fill(ds);
dataGridView1.DataSource = ds;
}
Conn();
int i = 0;
cmd = new SqlCommand("select * from tbl_Emp", con);
da = new SqlDataAdapter(cmd);
dt = new DataTable();
da.Fill(dt);
if (dt != null && dt.Rows.Count > 0)
{
if (Dgv_Emp.Rows.Count > 0)
{ Dgv_Emp.Rows.Clear(); }
Dgv_Emp.Rows.Add(dt.Rows.Count);
foreach (DataRow rw in dt.Rows)
{
Dgv_Emp.Rows[i].Cells[0].Value = rw["Emp_id"].ToString();
Dgv_Emp.Rows[i].Cells[1].Value = rw["Emp_name"].ToString();
Dgv_Emp.Rows[i].Cells[2].Value = rw["Emp_desg"].ToString();
Dgv_Emp.Rows[i].Cells[3].Value = rw["Emp_dept"].ToString();
Dgv_Emp.Rows[i].Cells[4].Value = rw["Emp_gender"].ToString();
Dgv_Emp.Rows[i].Cells[5].Value = rw["Emp_contact"].ToString();
i = i + 1;
}
}
Please use following code:
public DataTable GetResultsTable()
{
using (SqlDatabaseClient client = SqlDatabaseManager.GetClient())
{
DataTable _userTable = client.ExecuteQueryTable("SELECT * FROM users");
DataTable table = new DataTable();
table.Columns.Add("Username".ToString());
table.Columns.Add("Motto".ToString());
table.Columns.Add("Email".ToString());
table.Columns.Add("Homeroom".ToString());
table.Columns.Add("Health".ToString());
table.Columns.Add("Energy".ToString());
table.Columns.Add("Age".ToString());
foreach (DataRow _row in _userTable.Rows)
{
DataRow dr = table.NewRow();
dr["Username"] = "" + _row["username"] + "";
dr["Motto"] = "" + _row["motto"] + "";
dr["Email"] = "" + _row["mail"] + "";
dr["Homeroom"] = "" + _row["home_room"] + "";
dr["Health"] = "" + _row["health"] + "";
dr["Energy"] = "" + _row["energy"] + "";
dr["Age"] = "" + _row["age"] + "";
table.Rows.Add(dr);
}
return table;
}
}
public frmMain()
{
this.InitializeComponent();
this.SetupBackstageContent();
ribbonControl1.SelectedRibbonTabItem = ribbonTabItem1;
ribbonTabItem2.Text = "&USER CONTROL";
ribbonTabItem4.Text = "&ADD ONS";
SqlDatabaseManager.Initialize();
dataGridView1.DataSource = GetResultsTable();
}
Since u r passing DataRow as DataSource for DataGridView view hence only last row would be in datagridview. Here I change ur code and bind DataTable rather than DataRow with DataSource of DataGridView.
my problem is like that: I have a C# application having datagridview which has some textboxes and comboboxes in its columns. All the columns get the data from a database. Textboxes are readonly. When i ask for values in each row, i get the last selected component's value (i.e. combobox' value because textboxes are readonly) as null.
For example:
I have 10 cells in a row. The comboboxes are at 7th, 8th and 9th indexes in a row, where indexes from 0 to 6 are texboxes. When i select 3 of them (in order of 7, 8, 9) i cannot get the cell value of 9.
row.Cells[7].Value is OK,
row.Cells[8].Value is OK, and
row.Cells[9].Value is null
When i select any two of them let say first 8 and then 7, i cannot get the cell value of 7.
row.Cells[8].Value is OK and
row.Cells[7].Value is null
When i select only one item let say 9, i got the cell value again null.
As a result i get the last selected DataGridViewComboBoxCell as null.
Can anyone help me in my problem please? Thanks for all your help.
Here is my code:
private void cmbVariable_SelectedIndexChanged(object sender, EventArgs e)
{
ComboBox cmb = sender as ComboBox;
BringQuery(cmb.SelectedItem.ToString());
}
private void BringQuery(string option)
{
SqlConnection conn = new SqlConnection("Server = 10.2.6.14; Database = TTS; uid = myuser; password = mypassword");
DataTable dt1 = new DataTable();
SqlCommand cmd1 = new SqlCommand("select Track_Number, Parking_Area, Mission_Number, Track_Info, Time, Direction, Explanation from Traffic_Run_Table where Op_Type=#myType", conn);
SqlCommand cmd2 = new SqlCommand("select * from Traffic_Track_Table", conn);
SqlCommand cmd3 = new SqlCommand("select * from Traffic_Driver order by Id_Number", conn);
SqlDataAdapter sda1 = new SqlDataAdapter(cmd1);
cmd1.Parameters.Add(new SqlParameter("myType", option));
try
{
conn.Open();
sda1.Fill(dt1);
dataGridView2.AutoGenerateColumns = false;
foreach (DataGridViewColumn col in dataGridView2.Columns)
{
col.DataPropertyName = col.Name;
}
dataGridView2.DataSource = dt1;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
DataGridViewComboBoxColumn cmbCol1, cmbCol2, cmbCol3;
SqlDataAdapter sda2 = new SqlDataAdapter(cmd2);
DataTable dt2 = new DataTable();
try
{
cmbCol1 = new DataGridViewComboBoxColumn();
cmbCol1.HeaderText = "Track 1";
cmbCol1.Name = "Track1";
cmbCol1.DataPropertyName = cmbCol1.Name;
cmbCol1.ValueType = typeof(int);
cmbCol1.Width = 50;
cmbCol2 = new DataGridViewComboBoxColumn();
cmbCol2.HeaderText = "Track 2";
cmbCol2.Name = "Track2";
cmbCol2.DataPropertyName = cmbCol2.Name;
cmbCol2.ValueType = typeof(int);
cmbCol2.Width = 50;
sda2.Fill(dt2);
dt2.Columns[0].ColumnName = "Track";
foreach (DataRow dr in dt2.Rows)
{
cmbCol1.Items.Add(Convert.ToInt32(dr["Track"]));
cmbCol2.Items.Add(Convert.ToInt32(dr["Track"]));
}
dataGridView2.Columns.Add(cmbCol1);
dataGridView2.Columns.Add(cmbCol2);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
SqlDataAdapter sda3 = new SqlDataAdapter(cmd3);
DataTable dt3 = new DataTable();
try
{
cmbCol3 = new DataGridViewComboBoxColumn();
cmbCol3.HeaderText = "Driver";
cmbCol3.Name = "Driver";
cmbCol3.DataPropertyName = cmbCol3.Name;
cmbCol3.ValueType = typeof(string);
cmbCol3.Width = 260;
sda3.Fill(dt3);
dt3.Columns[0].ColumnName = "Id";
dt3.Columns[1].ColumnName = "Driver";
dt3.Columns[2].ColumnName = "Mission";
foreach (DataRow dr in dt3.Rows)
{
cmbCol3.Items.Add(Convert.ToString(dr["Id"]).Trim() + " - " + Convert.ToString(dr["Dirver"]).Trim() + " - " + Convert.ToString(dr["Mission"]).Trim());
}
dataGridView2.Columns.Add(cmbCol3);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
conn.Close();
}
public string CheckNull(object value, Type objType)
{
string retVal = string.Empty;
if (value == null || value.ToString() == " " || value.ToString() == "")
{
if (objType == typeof(int))
{
retVal = "0";
}
if (objType == typeof(string))
{
retVal = "-";
}
}
else
{
retVal = value.ToString();
}
return retVal;
}
private void Save_Click(object sender, EventArgs e)
{
SqlConnection connForSave = new SqlConnection("Server = 10.2.6.14; Database = TTS; uid = myuser; password = mypassword");
SqlCommand cmdForSave = new SqlCommand("insert into Traffic_Records values (#type, #trackNumber, #parkingArea, #missionNmb, #trackInfo, #time, #direction, #explanation, #track1, #track2, #driverId, #driverName, #driverMission, #date)", connForSave);
foreach (DataGridViewRow row in dataGridView2.Rows)
{
try
{
dataGridView2[7, row.Index].Selected = false;
dataGridView2[8, row.Index].Selected = false;
dataGridView2[9, row.Index].Selected = false;
connForSave.Open();
cmdForSave.Parameters.AddWithValue("type", CheckNull(cmbVairable.SelectedItem.ToString(), typeof(string)));
cmdForSave.Parameters.AddWithValue("trackNumber", Convert.ToInt16(CheckNull(row.Cells[0].Value, typeof(int))));
cmdForSave.Parameters.AddWithValue("parkingArea", CheckNull(row.Cells[1].Value, typeof(string)));
cmdForSave.Parameters.AddWithValue("missionNmb", Convert.ToInt16(CheckNull(row.Cells[2].Value, typeof(int))));
cmdForSave.Parameters.AddWithValue("trackInfo", CheckNull(row.Cells[3].Value, typeof(string)));
cmdForSave.Parameters.AddWithValue("time", CheckNull(row.Cells[4].Value, typeof(string)));
cmdForSave.Parameters.AddWithValue("direction", CheckNull(row.Cells[5].Value, typeof(string)));
cmdForSave.Parameters.AddWithValue("explanation", CheckNull(row.Cells[6].Value, typeof(string)));
cmdForSave.Parameters.AddWithValue("track1", Convert.ToInt16(CheckNull(row.Cells[7].Value, typeof(int))));
cmdForSave.Parameters.AddWithValue("track2", Convert.ToInt16(CheckNull(row.Cells[8].Value, typeof(int))));
string[] sArray = null;
if (string.Compare(CheckNull(row.Cells[9].Value, typeof(string)), "0") != 0 && string.Compare(CheckNull(row.Cells[9].Value, typeof(string)), "-") != 0)
{
sArray = row.Cells[9].Value.ToString().Split('-');
sArray[0] = sArray[0].Remove(sArray[0].Length - 2, 1);
sArray[1] = sArray[1].Remove(0, 1);
sArray[1] = sArray[1].Remove(sArray[1].Length - 2, 1);
sArray[2] = sArray[2].Remove(0, 1);
}
else
{
string temp = "0 - -";
sArray = temp.Split(' ');
}
cmdForSave.Parameters.AddWithValue("driverId", Convert.ToInt16(sArray[0]));
cmdForSave.Parameters.AddWithValue("driverName", sArray[1]);
cmdForSave.Parameters.AddWithValue("driverMission", sArray[2]);
cmdForSave.Parameters.AddWithValue("date", DateTime.Now);
cmdForSave.ExecuteNonQuery();
cmdForSave.Parameters.Clear();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + "\n Line Number: " + ex.LineNumber());
}
connForSave.Close();
}
}
This happens because DataGridView does not commit user made changes instantly but only after row is validated (I think, may be wrong here). So after you selected last value and did not change row (so validate event has not fired) the value in combo box is still null.
To fix this add CurrentCellDirtyStateChanged (more info here MSDN event to your grid:
private void GridCurrentCellDirtyStateChanged(object sender, EventArgs e)
{
dgvAssignedProperties.CommitEdit(DataGridViewDataErrorContexts.Commit);
}
and this why new values are committed right away.
I have created a datagridview programmatically.
So there is no bindingsource or datasource that we can connect both of the Datagridview and Binidgnavigator to them.
Is there any other way to connect them to each other.
Here is my code for datafridview
Help me to connect it to a bindingNavigator
private void Fill()
{
try
{
if (dataGridView1 != null)
{
dataGridView1.ColumnCount = 11;
dataGridView1.Columns[0].HeaderText = Resources.Form1_Fill_ID;
dataGridView1.Columns[1].HeaderText = Resources.Form1_Fill_Family;
dataGridView1.Columns[2].HeaderText = Resources.Form1_Fill_Cellphone;
dataGridView1.Columns[3].HeaderText = Resources.Form1_Fill_Phone1;
dataGridView1.Columns[4].HeaderText = Resources.Form1_Fill_Phone2;
dataGridView1.Columns[5].HeaderText = Resources.Form1_Fill_Phone3;
dataGridView1.Columns[6].HeaderText = Resources.Form1_Fill_Fax;
dataGridView1.Columns[7].HeaderText = Resources.Form1_Fill_CompanyName;
dataGridView1.Columns[8].HeaderText = Resources.Form1_Fill_Agency;
dataGridView1.Columns[9].HeaderText = Resources.Form1_Fill_Brands;
dataGridView1.Columns[10].HeaderText = Resources.Form1_Fill_Address;
dataGridView1.Columns[0].Name = Resources.Form1_Fill_ID;
dataGridView1.Columns[1].Name = Resources.Form1_Fill_Family;
dataGridView1.Columns[2].Name = Resources.Form1_Fill_Cellphone;
dataGridView1.Columns[3].Name = Resources.Form1_Fill_Phone1;
dataGridView1.Columns[4].Name = Resources.Form1_Fill_Phone2;
dataGridView1.Columns[5].Name = Resources.Form1_Fill_Phone3;
dataGridView1.Columns[6].Name = Resources.Form1_Fill_Fax;
dataGridView1.Columns[7].Name = Resources.Form1_Fill_CompanyName;
dataGridView1.Columns[8].Name = Resources.Form1_Fill_Agency;
dataGridView1.Columns[9].Name = Resources.Form1_Fill_Brands;
dataGridView1.Columns[10].Name = Resources.Form1_Fill_Address;
}
_conn.ConnectionString = _connectionString;
var cmd = new OleDbCommand("Select * from contacts ", _conn);
_conn.Open();
OleDbDataReader reader = cmd.ExecuteReader();
int i = 0;
while (reader != null && reader.Read())
{
if (dataGridView1 != null)
{
dataGridView1.Rows.Add(1);
}
if (dataGridView1 != null)
{
var row = dataGridView1.Rows[i];
row.Cells[Resources.Form1_Fill_ID].Value = reader[0].ToString();
row.Cells[Resources.Form1_Fill_Family].Value = reader[1].ToString();
row.Cells[Resources.Form1_Fill_Cellphone].Value = reader[2].ToString();
row.Cells[Resources.Form1_Fill_Phone1].Value = reader[3].ToString();
row.Cells[Resources.Form1_Fill_Phone2].Value = reader[4].ToString();
row.Cells[Resources.Form1_Fill_Phone3].Value = reader[5].ToString();
row.Cells[Resources.Form1_Fill_Fax].Value = reader[6].ToString();
row.Cells[Resources.Form1_Fill_CompanyName].Value = reader[7].ToString();
row.Cells[Resources.Form1_Fill_Agency].Value = reader[8].ToString();
row.Cells[Resources.Form1_Fill_Brands].Value = reader[9].ToString();
row.Cells[Resources.Form1_Fill_Address].Value = reader[10].ToString();
}
i++;
}
}
catch (Exception ex)
{
return;
}
finally
{
_conn.Close();
}
}
Try to revise your code. You don't need to create a column programmactically, your query itself could create a column through DataTable to BindingSource, try this code and get some idea.
BindingNavigator and BindingSource
string connectionString =
#"Provider=Microsoft.ACE.OLEDB.12.0;" +
#"Data Source=D:\myDatabase.accdb;";
string queryString = "SELECT Name AS FullName, Gender AS Gender, Address AS [Current Address] FROM Person";
using (OleDbConnection connection = new OleDbConnection(connectionString))
using (OleDbCommand command = new OleDbCommand(queryString, connection))
{
try
{
BindingSource bs = new BindingSource();
OleDbDataAdapter dataAdapter = new OleDbDataAdapter(queryString, connection);
OleDbCommandBuilder commandBuilder = new OleDbCommandBuilder(dataAdapter);
DataTable dataTable = new DataTable();
dataAdapter.Fill(dataTable);
bs.DataSource = dataTable;
dataGridView1.DataSource = bs;
bindingNavigator1.BindingSource = bs;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
I am using window.open to open 2 different pages in pop-up windows,but for some reason both the triggers opens the same page in the pop-up window,heres how I am trying to do this:
first:
Response.Write("<script type='text/javascript'>window.open('TransEditEntry.aspx','mywindow','width=850px,height=300px,left=0,top=10,screenX=100,screenY=10')</script>");
second:
Response.Write(#"<script type='text/javascript'>window.open('TransNewEntry.aspx','','width=850px,height=300px,left=0,top=10,screenX=100,screenY=10')</script>");
this opens 'TransEditEntry.aspx' page instead of 'TransNewEntry.aspx'`
here the rest of the code:
The entire function which is called on add button click:
protected void addNew(object sender, EventArgs e)
{
//HiddenField sr = (HiddenField)GridView1.SelectedRow.Cells[6].FindControl("srno");
//Session["TransSrNo"] = sr.Value;
Response.Write(#"<script type='text/javascript'>window.open('TransNewEntry.aspx','','width=850px,height=300px,left=0,top=10,screenX=100,screenY=10')</script>");
//Session["transAdd"] = "1";
}
The add button which calls the function:
<asp:Button ID="AddBtn" runat="server" OnClick="addNew" Text="Add"/>
The page TransNewEntry.aspx.cs
public partial class TransEditEntry : System.Web.UI.Page
{
SqlConnection con = new SqlConnection(GetConnectionString.Get());
string subCode;
DataTable dt;
SqlDataAdapter sda;
SqlCommandBuilder build;
DataRow dr;
DataSet ds = new DataSet();
protected void Page_Load(object sender, EventArgs e)
{
Response.Write((Session["TransSrNo"]).ToString());
int SRno = Convert.ToInt32((Session["TransSrNo"]).ToString());
con.Open();
SqlCommand cmd3 = new SqlCommand("select sub_code from tran_dtls where sr_no='" + SRno + "'", con);
subCode = (string)cmd3.ExecuteScalar();
con.Close();
if (!IsPostBack)
{
sda = new SqlDataAdapter("select * from tran_dtls where sr_no=" + SRno + "", con);
build = new SqlCommandBuilder(sda);
dt = new DataTable();
sda.Fill(dt);
foreach (DataRow row in dt.Rows)
{
srNoTxt.Text = "";
amttxt.Text = "";
partTxt.Text = "";
checkNoTxt.Text = "";
checkDtTxt.Text = "";
refNoTxt.Text = "";
refDtTxt.Text = "";
jobNoTxt.Text = "";
}
}
}
protected void GlChange(object sender, EventArgs e)
{
con.Open();
SqlCommand cmd4 = new SqlCommand("select ac_type from ac_mstr where AC_desc='" + GlDrp.SelectedValue + "'", con);
string acType = (string)cmd4.ExecuteScalar();
SqlCommand cmd5 = new SqlCommand("select gl_code from ac_mstr where AC_desc='" + GlDrp.SelectedValue + "'", con);
string gl_code = (string)cmd5.ExecuteScalar();
if (acType == "S")
{
SqlDataSource3.SelectCommand = ("select ac_desc from ac_mstr where gl_code='" + gl_code + "'");
subDrp.DataBind();
subDrp.Enabled = true;
//Response.Write("<script type='javacript/text'>alert('1')</script>");
}
else
{
subDrp.Enabled = false;
//Response.Write("<script type='javacript/text'>alert('2')</script>");
}
con.Close();
}
protected void saveRow(object sender, EventArgs e)
{
int SRno = Convert.ToInt32((Session["TransSrNo"]).ToString());
sda = new SqlDataAdapter("select * from tran_dtls where tc='" + Session["TC"] + "' and doc_no='" + Session["docNo"] + "' ", con);
build = new SqlCommandBuilder(sda);
//dt = new DataTable();
// DataSet ds = new DataSet();
sda.Fill(ds);
dt = (DataTable)ViewState["myViewState"];
if (Session["gridRow"] == null)
{
dt = ds.Tables[0];
dr = dt.NewRow();
dr["GL_code"] = GlDrp.SelectedValue;
dr["sub_code"] = subDrp.SelectedValue;
dr["particulars"] = partTxt.Text;
dr["chq_no"] = checkNoTxt.Text;
dr["chq_dt"] = checkDtTxt.Text;
dr["ref_no"] = refNoTxt.Text;
dr["ref_dt"] = refDtTxt.Text;
dr["dbcr"] = dbcrDrp.SelectedValue.ToString().Substring(0, 1);
dr["amt"] = amttxt.Text;
dr["job_no"] = jobNoTxt.Text;
dr["EMP"] = empDrop.SelectedValue;
dt.Rows.Add(dr);
dt.AcceptChanges();
ViewState["myViewState"] = dt;
//Session["gridRow"] = dt;
Session["gridRow"] = dt;
Session["saveToggle"] = "1";
closeFunction();
Response.Write("<script type='text/javascript'>this.close()</script>");
}
else
{
dt = (DataTable)Session["gridRow"];
dr = dt.NewRow();
dr["GL_code"] = GlDrp.SelectedValue;
dr["sub_code"] = subDrp.SelectedValue;
dr["particulars"] = partTxt.Text;
dr["chq_no"] = checkNoTxt.Text;
dr["chq_dt"] = checkDtTxt.Text;
dr["ref_no"] = refNoTxt.Text;
dr["ref_dt"] = refDtTxt.Text;
dr["dbcr"] = dbcrDrp.SelectedValue.ToString().Substring(0, 1);
dr["amt"] = amttxt.Text;
dr["job_no"] = jobNoTxt.Text;
dr["EMP"] = empDrop.SelectedValue;
dt.Rows.Add(dr);
dt.AcceptChanges();
ViewState["myViewState"] = dt;
//Session["gridRow"] = dt;
Session["gridRow"] = dt;
Session["saveToggle"] = "1";
//Response.Write("<script type='text/javascript'>window.opener.location.reload(true);</script>");
closeFunction();
Response.Write("<script type='text/javascript'>this.close()</script>");
}
}
private void closeFunction()
{
StringBuilder sb = new StringBuilder();
sb.Append("window.opener.RefreshPage();");
sb.Append("window.close();");
ClientScript.RegisterClientScriptBlock(this.GetType(), "CloseWindowScript", sb.ToString(), true);
}
}
Check your condition where you are doing : Response.Write. Both the conditions must be pointing out for first>
I having problem on deleting a row of data returned by a search query.
I wish the user can select whichever row of data and click on the delete button [button1_click] to delete it from DB. This is a windows form application.
Hope you can advise me. Thanks a lot.
Below is my code
public partial class Search : Form
{
public Search()
{
InitializeComponent();
string strConn = #"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\Project\DB_Booking.mdb;";
DataTable ds = new DataTable();
using (var cn = new OleDbConnection(strConn))
{
cn.Open();
using (var cmd = new OleDbCommand("SELECT * FROM staff", cn))
{
using (OleDbDataAdapter adp = new OleDbDataAdapter(cmd))
adp.Fill(ds);
comboBox1.DataSource = ds;
comboBox1.ValueMember = "sname";
comboBox1.SelectedIndex = 0;
}
}
}
private void btn_search_bystaffname_Click(object sender, EventArgs e)
{
string strConn = #"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\Project\DB_Booking.mdb;";
DataTable dt = new DataTable();
using (var cn = new OleDbConnection(strConn))
{
cn.Open();
using (var cmd = new OleDbCommand("SELECT * FROM booking WHERE sname = #sname", cn))
{
//cmd.Parameters.AddWithValue("#bdate", dtp_search_date.Value.Date);
cmd.Parameters.AddWithValue("#sname", comboBox1.SelectedValue);
using (OleDbDataAdapter oda = new OleDbDataAdapter(cmd))
oda.Fill(dt);
GridView1.DataSource = dt;
GridView1.Columns[0].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[1].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[2].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[3].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[4].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[5].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[0].HeaderText = "Booking ID";
GridView1.Columns[1].HeaderText = "Client Name";
GridView1.Columns[2].HeaderText = "Booking Date";
GridView1.Columns[3].HeaderText = "Booking Time";
GridView1.Columns[4].HeaderText = "Client Contact";
GridView1.Columns[5].HeaderText = "Staff Name";
this.GridView1.DefaultCellStyle.Font = new Font("Times New Roman", 12);
this.GridView1.DefaultCellStyle.ForeColor = Color.Blue;
this.GridView1.DefaultCellStyle.BackColor = Color.Beige;
this.GridView1.DefaultCellStyle.SelectionForeColor = Color.Yellow;
this.GridView1.DefaultCellStyle.SelectionBackColor = Color.Black;
this.GridView1.Columns[0].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
this.GridView1.Columns[1].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
this.GridView1.Columns[2].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
this.GridView1.Columns[3].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
this.GridView1.Columns[4].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
this.GridView1.Columns[5].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
}
}
}
private void btn_search_bydate_Click(object sender, EventArgs e)
{
string strConn = #"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\Project\DB_Booking.mdb;";
DataTable dt = new DataTable();
using (var cn = new OleDbConnection(strConn))
{
cn.Open();
using (var cmd = new OleDbCommand("SELECT * FROM booking WHERE bdate = #bdate", cn))
{
cmd.Parameters.AddWithValue("#bdate", dtp_search_date.Value.Date);
cmd.Parameters.AddWithValue("#sname", comboBox1.SelectedValue);
using (OleDbDataAdapter oda = new OleDbDataAdapter(cmd))
oda.Fill(dt);
GridView1.DataSource = dt;
GridView1.Columns[0].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[1].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[2].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[3].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[4].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[5].HeaderCell.Style.Alignment = DataGridViewContentAlignment.TopCenter;
GridView1.Columns[0].HeaderText = "Booking ID";
GridView1.Columns[1].HeaderText = "Client Name";
GridView1.Columns[2].HeaderText = "Booking Date";
GridView1.Columns[3].HeaderText = "Booking Time";
GridView1.Columns[4].HeaderText = "Client Contact";
GridView1.Columns[5].HeaderText = "Staff Name";
this.GridView1.DefaultCellStyle.Font = new Font("Times New Roman", 12);
this.GridView1.DefaultCellStyle.ForeColor = Color.Blue;
this.GridView1.DefaultCellStyle.BackColor = Color.Beige;
this.GridView1.DefaultCellStyle.SelectionForeColor = Color.Yellow;
this.GridView1.DefaultCellStyle.SelectionBackColor = Color.Black;
this.GridView1.Columns[0].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
this.GridView1.Columns[1].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
this.GridView1.Columns[2].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
this.GridView1.Columns[3].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
this.GridView1.Columns[4].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
this.GridView1.Columns[5].DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
}
}
}
private void button1_Click(object sender, EventArgs e)
{
GridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
DataGridViewRow row = GridView1.SelectedRows[0];
GridView1.Rows.Remove(row);
}
}
}
I'm assuming this is the method you want to change
private void button1_Click(object sender, EventArgs e)
{
GridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
DataGridViewRow row = GridView1.SelectedRows[0];
GridView1.Rows.Remove(row);
}
This GridView1.Rows.Remove(row); will only remove the item from the DaDataGridViewRowCollection and will not remove it from the database.
To remove it from the database you can do one of the following
Remove it from `DataTable' and then use a DataAdapter and call update.
Directly delete it from the database using a DELETE SQL statement through a OleDbCommand.
If you choose option one you'd be well served by making dt a Field on your Form. This is because you can only access it now via ((DataRow)row.DataBoundItem).Table or GridView1.DataSource in the button1_Click event. Also making the DataAdapter a field would make this easier
e.g.
GridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
DataGridViewRow row = GridView1.SelectedRows[0];
DataRow dRow = (DataRow)row.DataBoundItem;
dt.Rows.Remove(dRow);
Adapter.Update(dt);
As an aside you can choose to do only the dt.Rows.Remove(dRow); in the button1_Click and defer the Adapter.Update(dt) until later in a Save button.
If you go with option two you'll need to remove it from the DataTable or refresh the DataTable
e.g.
GridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
DataGridViewRow row = GridView1.SelectedRows[0];
OleDbCommand cmd = new OleDbCommand(
using (var cn = new OleDbConnection(strConn))
{
cn.Open();
// not 100% this delete syntax is correct for Access
using (var cmd = new OleDbCommand("DELETE booking WHERE [Booking ID] = #BookingId", cn))
{
cmd.Parameters.AddWithValue("#BookingId", dRow["Booking Id"]);
cmd.ExecuteNonQuery();
}
}
// Do this to update the in-memory representation of the Data
DataRow dRow = (DataRow)row.DataBoundItem;
dt.Rows.Remove(dRow);
// Or just refresh the datatable using code similar as your search methods
Here's how I've been doing it in my application (My unique identifier for the mysql table is in cell zero):
Oh, and dtcommand is a class instance for a database command class I use for common db stuff.
int userDeleteIndex;
if (int.TryParse(datagridview.Rows[rowIndex].Cells[0].Value.ToString(), out userDeleteIndex))
{
if (MessageBox.Show("Delete " + recordidentifyingdata + "? ", "Delete " + userDeleteIndex.ToString(), MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
try
{
string updateUserSql = "DELETE FROM table WHERE user_id = " + userDeleteIndex.ToString() + "; ";
dtCommand.UpdateTable(updateUserSql);
InitializeUserDataView();
// Initalize userdataview refreshes the datagridview with the updated info
}
catch (Exception err)
{
Error trapping goes here
}
Here's the database update section from my class:
public int UpdateTable(string updateString, string MySqlConnectionString)
{
int returnValue = 0;
MySqlConnection connection = new MySqlConnection(MySqlConnectionString);
MySqlCommand command = new MySqlCommand(updateString, connection);
try
{
connection.Open();
command.ExecuteNonQuery();
}
catch (Exception err)
{
WriteErrorLog("Unable to update table: " + err.ToString() +
" - Using SQL string: " + updateString + ".");
//MessageBox.Show("An error has occured while updating the database.\n" +
//"It has been written to the file: " + errorFile + ".", "Database Error");
returnValue = -1;
}
finally
{
connection.Close();
}
return (returnValue);
}