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when try to add check box to grid view on asp.net forms i get error?

I work on asp.net web forms with c# I need to add checkbox column as last column on gridview
but i don't know how to add it
static string con =
"Data Source=DESKTOP-L558MLK\\AHMEDSALAHSQL;" +
"Initial Catalog=UnionCoop;" +
"User id=sa;" +
"Password=321;";
SqlConnection conn = new SqlConnection(con);
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
GridViewSearch.DataSource = GetDataForSearch();
GridViewSearch.DataBind();
}
}
public DataTable GetDataForSearch()
{
string response = string.Empty;
SqlCommand cmd = new SqlCommand();
DataTable dt = new DataTable();
try
{
conn.Open();
cmd.Connection = conn;
cmd.CommandText = "select top 10 datelogged AS EntredDatetime, Doc_type AS OrderType, Printer_name, BranchID AS BranchCode, id from Print_Report";
cmd.CommandType = CommandType.Text;
cmd.CommandTimeout = 50000;
SqlDataAdapter sda = new SqlDataAdapter(cmd);
sda.Fill(dt);
}
catch (Exception ex)
{
response = ex.Message;
}
finally
{
cmd.Dispose();
conn.Close();
}
return dt;
}
on aspx page
<asp:GridView ID="GridViewSearch" runat="server">
</asp:GridView>
GridViewSearch.DataSource = GetDataForSearch();
DataGridViewCheckBoxColumn checkColumn = new DataGridViewCheckBoxColumn();
checkColumn.Name = "X";
checkColumn.HeaderText = "X";
checkColumn.Width = 50;
checkColumn.ReadOnly = false;
checkColumn.FillWeight = 10; //if the datagridview is resized (on form resize) the checkbox won't take up too much; value is relative to the other columns' fill values
GridViewSearch.Columns.Add(checkColumn);
GridViewSearch.DataBind();
I get error on line below
GridViewSearch.Columns.Add(checkColumn);
argument 1 can't convert from system.windows.forms.datagridviewcheckbox to system.web.ui.webcontrol.databoundfield
so how to solve this issue please ?

Seems to me, that if you want say a button, or check box, or dropdown?
why not just add it to the markup.
So, say like this:
<div id="MyGridPick" runat="server" style="display:normal;width:40%">
<asp:Label ID="lblSel" runat="server" Text="" Font-Size="X-Large"></asp:Label>
<br />
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataKeyNames="ID" cssclass="table table-hover" OnRowDataBound="GridView1_RowDataBound" >
<Columns>
<asp:BoundField DataField="FirstName" HeaderText="FirstName" />
<asp:BoundField DataField="LastName" HeaderText="LastName" />
<asp:BoundField DataField="City" HeaderText="City" />
<asp:BoundField DataField="HotelName" HeaderText="HotelName" ItemStyle-Width="120px" />
<asp:BoundField DataField="Description" HeaderText="Description" />
<asp:TemplateField HeaderText="Select" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
<asp:CheckBox ID="chkSel" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
Then my code to load is this:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
LoadGrid();
}
void LoadGrid()
{
SqlCommand cmdSQL =
new SqlCommand("SELECT * FROM tblHotelsA ORDER BY HotelName");
GridView1.DataSource = MyRstP(cmdSQL);
GridView1.DataBind();
}
Now, of course I get VERY tired of typing that connection string stuff over and over. So, I have a "genreal" routine like this:
public DataTable MyRstP(SqlCommand cmdSQL)
{
DataTable rstData = new DataTable();
using (SqlConnection conn = new SqlConnection(Properties.Settings.Default.TEST4))
{
cmdSQL.Connection = conn;
using (cmdSQL)
{
conn.Open();
rstData.Load(cmdSQL.ExecuteReader());
}
}
return rstData;
}
And the result of running above:
So, kind of hard to make the case to "add" a check box control, when you can just drop one into the gridview.
Same goes for a button, maybe we want a button to "view" or edit the above row, or some such.
So, once again, just drop in a plain jane button, say like this:
<asp:TemplateField HeaderText="View" ItemStyle-HorizontalAlign="Center" >
<ItemTemplate>
<asp:Button ID="bView" runat="server" Text="View" CssClass="btn"
OnClick="bView_Click" />
</ItemTemplate>
</asp:TemplateField>
And now we have this:
And EVEN better?
Well, since that button (or check box) is a plain jane standard control?
then you can add standard events, like a click event, or whatever you want.
Say this code for the button click (shows how to get current row).
protected void bView_Click(object sender, EventArgs e)
{
Button btn = sender as Button;
GridViewRow gRow = btn.NamingContainer as GridViewRow;
int PKID = (int)GridView1.DataKeys[gRow.RowIndex]["ID"];
SqlCommand cmdSQL =
new SqlCommand("SELECT * FROM tblHotelsA WHERE ID = #ID");
cmdSQL.Parameters.Add("#ID", SqlDbType.Int).Value = PKID;
DataTable dtHotel = MyRstP(cmdSQL);
General.FLoader(MyEditArea, dtHotel.Rows[0]);
MyGridPick.Style.Add("display", "none"); // hide grid
MyEditArea.Style.Add("display", "normal"); // show edit div area
}
And we now get/see this:
Edit: Process each checked/selected row.
this:
protected void cmdSelProcess_Click(object sender, EventArgs e)
{
// process all rows in GV with check box
String sPK = "";
List<int> MySelected = new List<int>();
foreach (GridViewRow gRow in GridView1.Rows)
{
CheckBox chkSel = (CheckBox)gRow.FindControl("chkSel");
if (chkSel.Checked)
{
int PK = (int)GridView1.DataKeys[gRow.RowIndex]["ID"];
// add pk value of row to our list
MySelected.Add(PK);
// Or we could process data based on current gRow
if (sPK != "")
sPK += ",";
sPK += PK.ToString();
Debug.Print(PK.ToString());
}
}
// at this point, we have a nice list of selected in MySelected
// or, maybe process as a data table
SqlCommand cmdSQL =
new SqlCommand($"SELECT * FROM tblHotelsA where ID IN({sPK})");
DataTable rstSelected = MyRstP(cmdSQL);
//
foreach (DataRow dr in rstSelected.Rows)
{
// do whatever
}
}

Datagridviewcheckboxcolumn is a Windows formx object. You are working in web forms. Please see the link below for information on the webforms check box field
CheckBoxField checkColumn = new CheckBoxField();

How to add event on buttonfield in a datagridview

I'm currently using ASP.net and C#. I want to add an "Edit" button to my grid view, but I don't know how can I add a command on the button. And I also would gladly welcome any suggestions on how I can enhance this gridview.
protected void Page_Load(object sender, EventArgs e)
{
if (Session["id"] == null)
{
Response.Redirect("~/LoginPage.aspx");
}
lbl_name.Text = "Welcome :: " + Session["username"];
using (MySqlConnection con = new MySqlConnection(ConfigurationManager.ConnectionStrings["DBCon"].ConnectionString))
{
constructor var = new constructor();
con.Open();
string sql = "SELECT product_name,product_price,product_desc,product_stock FROM product_tbl";
MySqlCommand cmd = new MySqlCommand(sql, con);
MySqlDataReader reader1 = cmd.ExecuteReader();
reader1.Close();
try
{
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "user_tbl");
GridView1.DataSource = ds.Tables["user_tbl"];
GridView1.DataBind();
}
catch (Exception ex)
{
lbl_result.Text = "ERROR>>" + ex.Message + "!";
}
finally
{
con.Close();
sql = null;
}
}
}

You can use RowCommand Event in GridView. The RowCommand Event occurs when a button is clicked in a GridView control. See this

You can add a CommandField with the Edit button:
<asp:GridView ID="GridView1" runat="server" OnRowEditing="GridView1_RowEditing" ...>
<asp:CommandField ButtonType="Link" ShowEditButton="true" ShowCancelButton="true" />
....
</asp:GridView>
And process the RowEditing event:
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
GridView1.DataSource = ...
GridView1.DataBind();
}
More details are given here: ASP.NET GridView: How to edit and delete data records.

Binding data dynamically in ListView2 on Selected_indexChanged() of ListView1

I am working in a project where i need to list the database child items in listview2 who's parent items reside in listview1 already. here is my listview1 code;
<asp:ListView
ID="ListView1"OnSelectedIndexChanged="ListView1_SelectedIndexChanged" runat="server">
<ItemTemplate>
<a href='<%# Eval("Module_Redirect") %>'> <img src="<%#
Eval("Module_img") %>" /> </a>
</ItemTemplate>
the .cs page code is as follow(which is not working yet!)
protected void ListView1_SelectedIndexChanged(object sender, EventArgs e)
{
if (this.ListView1.SelectedIndex == 3)
{
SqlDataAdapter da2 = new SqlDataAdapter();
da2.SelectCommand = new SqlCommand("select * from tbl_Forms where Module_ID=3 ", conn);
DataTable dt2= new DataTable();
da2.Fill(dt2);
ListView2.DataSource = dt2;
ListView2.DataBind();
}
}
My point is: how can in fetch the selected item templete of listview1 and show the relevent record in listview2?

you can try this.
using (SqlConnection con = new SqlConnection("YourConnectioString"))
{
using (SqlDataAdapter da2 = new SqlDataAdapter { SelectCommand = new SqlCommand("select * from tbl_Forms where Module_ID = #Module_ID ", con) })
{
// as your using index as the parameter,,
da2.SelectCommand.Parameters.AddWithValue("#Module_ID", ListView1.SelectedIndex);
// or if your trying to pass parameter Module_ID from ListView1 DataKey ,, you can use SelectedDataKey
//da2.SelectCommand.Parameters.AddWithValue("#Module_ID", ListView1.SelectedDataKey);
using (DataTable dt2 = new DataTable())
{
con.Open();
da2.Fill(dt2);
ListView2.DataSource = dt2;
ListView2.DataBind();
}
}
}

how to get column data when check box is checked using data list in asp.net

this is eswar.k , i have one problem in asp.net..that is ..
i have one datalist .that is shows data from database ..that is contains .check box,image,and lables..here what is the problem .. when i am checked on check box ,i have to display the email labels into the text box..(like multiple recipients eg:eswar#gmil.com,eee#yahoo.in..etc )
protected void Page_Load(object sender, EventArgs e)
{
DataTable dt = new DataTable();
string strconnstring = System.Configuration.ConfigurationManager.ConnectionStrings["sqlcon"].ConnectionString;
string strquery = "select chid,chname,chlanguage,chrating,chemail,contenttype,data from tbl_channel_join Order by chid";
SqlCommand cmd = new SqlCommand(strquery);
SqlConnection con = new SqlConnection(strconnstring);
SqlDataAdapter sda = new SqlDataAdapter();
cmd.CommandType = CommandType.Text;
cmd.Connection = con;
try
{
con.Open();
sda.SelectCommand = cmd;
sda.Fill(dt);
//GridView1.DataSource = dt;
//GridView1.DataBind();
//GridView2.DataSource = dt;
//GridView2.DataBind();
dl_channels.DataSource = dt;
dl_channels.DataBind();
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
finally
{
con.Close();
sda.Dispose();
con.Dispose();
dt.Dispose();
}

Let's say you have a Gridview with checkbox like this :
<asp:GridView ID="GridView1" runat="server">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="checkIT" runat="server"/>
</ItemTemplate>
</asp:TemplateField>
</asp:GridView>
<asp:Button ID="btnDisplay" runat="server" Text="Show data selected" OnClick="btnDisplay_Click"/>
<asp:TextBox id="textboxDataDisplay" runat="server" />
with a button to show the selected checkbox columns
C# code
protected void btnDisplay_Click(object sender, EventArgs e)
{
string data = "";
foreach (GridViewRow row in GridView1.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
CheckBox chkRow = (row.Cells[0].FindControl("chkCtrl") as CheckBox);
if (chkRow.Checked)
{
string yourFirstRowCell = row.Cells[1].Text;
string yourSecondRowCell = row.Cells[2].Text;
string yourThirdRowCell = row.Cells[3].Text;
data = yourFirstRowCell + yourSecondRowCell + yourThirdRowCell;
}
}
}
textboxDataDisplay.text = data;
}
Row cells are the cells in that row you want to get where the checkbox is checked.

How to Save the data from a GridView to SQL Server 2005? How to Edit and Delete rows in the Gridview?

I have a GridView containing data extracted from two TextBoxes on click of a button. I want the following functionalities to be implemented in the Gridview:
1) I want to be able to Edit the data in this GridView.
2) I should also be able to Delete the rows from the GridView.
3) Finally, when I click on another Submit button, all the rows from the Gridview should be saved in the database.
Its a web-based ASP.NET application coded using C# (Visual Studio 2010), and uses SQL Server 2005. How can I make changes to the below code to implement the above specified functionality?
public partial class _Default : System.Web.UI.Page
{
SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings["constring"]);
SqlCommand cmd = new SqlCommand();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter();
DataTable dt = new DataTable();
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
dt = Session["data_table"] as DataTable;
}
}
protected void btnTextDisplay_Click(object sender, EventArgs e)
{
if (dt == null)
{
dt = new DataTable();
DataColumn dc1 = new DataColumn("Name");
DataColumn dc2 = new DataColumn("City");
dt.Columns.Add(dc1);
dt.Columns.Add(dc2);
Session["data_table"] = dt;
}
DataRow dr = dt.NewRow();
dr[0] = txtName.Text;
dr[1] = txtCity.Text;
dt.Rows.Add(dr);
gvDisplay.DataSource = dt;
gvDisplay.DataBind();
}
protected void btnDisplay_Click(object sender, EventArgs e)
{
ds.Clear();
da = new SqlDataAdapter("insert into PRACT values(#name, #city)", con);
con.Open();
da.Fill(ds);
gv.DataSource = ds;
gv.DataBind();
con.Close();
}
}

Well on your aspx page I would recommend you to do that:
<asp:GridView runat="server" id="gvDisplay" OnRowCommand="grid_OnRowCommand">
<Columns>
<TemplateField>
<ItemTemplate>
<asp:TextBox runat="server" id="txtNameGrid" Text='<%#DataBinder.Eval(Container.DataItem, "Name")%>'/>
</ItemTemplate>
</TemplateField>
<TemplateField>
<ItemTemplate>
<asp:TextBox runat="server" id="txtCityGrid" Text='<%#DataBinder.Eval(Container.DataItem, "City")%>'/>
</ItemTemplate>
</TemplateField>
<TemplateField>
<ItemTemplate>
<asp:Button runat="server" id="btnDeleteGrid" Text = "Delete" CommandArgument='<%#Eval(Container.DataItem, "YourIDColumn")%>' CommandName="DeleteRow"/>
</ItemTemplate>
</TemplateField>
</Columns>
</asp:GridView>
I recommend you to create a new column in your DataTable, this column will be the ID of each register.
Well, you add registers to this DataTable on your page, so you will need to create a session of type int and each time the event btnTextDisplay_Click is called you must increase this int Session and set it's value to the DataTable's Column ID.
The grid's attribute, OnRowCommand, is the event that will be called when you click on the button btnDeleteGrid. The code of this event comes below:
protected void grid_OnRowCommand(object sender, GridViewCommandEventArgs e)
{
if(e.CommandName == "DeleteRow")
{
foreach(DataRow row in dt.Rows)
{
if(Convert.ToInt32(row["YourColumnID"]) == Convert.ToInt32(e.CommandArgument))
row.Delete();
}
dt.AcceptChanges();
gvDisplay.DataSource = dt;
gvDisplay.DataBind();
}
}
Your event that will save the registers should be like that.
protected void btnSave_Click(object sender, EventArgs e)
{
foreach(DataRow row in dt.Rows)
{
SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings["constring"]);
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "INSERT INTO YOUR_TABLE_NAME (NAME, CITY) VALUES (" + row["Name"].ToString() + "," + row["City"].ToString() + ")";
int numRegs = cmd.ExecuteNonQuery();
}
}
I really expect I helped.
I can't test my code and I'm not so good on work with DataTables, so if there's any problem with my code, just let me know.
I think it will be more efficient if you use Bulk Inserts to realize the inserts. Search for how to make it, it's pretty cool and quick.
And also try to use Stored Procedures, because it's safer than use direct command texts. Using them will prevent SQL Injection.
Best regards.