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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 manage Large amount of Data in GridView

I Have a table with 10000 records, so I want call only 15 Records at a single time using Stored procedure.
At the Next time call only next 15 Reocords and go On...
Please Help me out!!...If Possible Give Code With Example and Stored Procedure...Thank You!!!

Use paging in gridview as AllowPaging="true" then use
OnPageIndexChanging Event and give us PageSize see below example
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" AllowPaging="true"
OnPageIndexChanging="OnPageIndexChanging" PageSize="10">
<Columns>
<asp:BoundField ItemStyle-Width="150px" DataField="Column_Name" HeaderText="Header Name" />
<asp:BoundField ItemStyle-Width="150px" DataField="Column_Name" HeaderText="Header Name" />
<asp:BoundField ItemStyle-Width="150px" DataField="Column_Name" HeaderText="Header Name" />
</Columns>
</asp:GridView>
Now bind the gridview with database on Page_Load Event
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGrid();
}
}
private void BindGrid()
{
string conStr = #"Your connection string here";
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("SELECT * FROM Table_Name"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataTable dt = new DataTable())
{
sda.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
}
}
}
}
}
for pages use newPageIndex on OnPageIndexChanging event
protected void OnPageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
BindGrid();
}

Inserting data in sql from RadGrid with check box

I am trying to insert data from my radGrid that has some data to my sql. in my rad grid i also have a check box column so i want the checked rows to be inserted in my db. i am using the code below but gives me this error:
Error 30 'Telerik.Web.UI.RadGrid' does not contain a definition for 'Rows' and no extension method 'Rows' accepting a first argument of type 'Telerik.Web.UI.RadGrid' could be found (are you missing a using directive or an assembly reference?) any idea where i am doing wrong???
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.BindGrid();
}
}
private void BindGrid()
{
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("SELECT [ReportId], [Report], [IsSelected] FROM Hobbies"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataTable dt = new DataTable())
{
sda.Fill(dt);
RadGrid1.DataSource = dt;
RadGrid1.DataBind();
}
}
}
}
}
protected void Rows()
{
}
protected void Save2_Click(object sender, EventArgs e)
{
try
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Rights"].ConnectionString);
string insert = "insert into Rights(Name,Mbiemri,Gjinia,Departamenti,Mosha,IntRights,Transferta,Depozita,Rapore) values (#Name,#Mbiemri,#Gjinia,#Departamenti,#Mosha,#IntRights,#Transferta,#Depozita,#Rapore)";
SqlCommand cnd = new SqlCommand(insert, con);
con.Open();
foreach (GridViewRow row in RadGrid1.Rows)
{
//Get the HobbyId from the DataKey property.
int ReportID = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Values[0]);
//Get the checked value of the CheckBox.
bool isSelected = (row.FindControl("chkSelect") as CheckBox).Checked;
//Save to database
cmd.Parameters.Clear();
cmd.Parameters.AddWithValue("#ReportId", ReportID);
cmd.Parameters.AddWithValue("#IsSelected", isSelected);
cmd.ExecuteNonQuery();
}
cnd.Parameters.AddWithValue("#Name", TextBox1.Text);
cnd.Parameters.AddWithValue("#Mbiemri", TextBox2.Text);
cnd.Parameters.AddWithValue("#Gjinia", RadioButtonList1.SelectedValue);
cnd.Parameters.AddWithValue("#Departamenti", SelectDepartament.SelectedItem.Text);
cnd.Parameters.AddWithValue("#Mosha", RadDropDownList1.SelectedItem.Text);
cnd.Parameters.AddWithValue("#IntRights", RadDropDownList2.SelectedItem.Text);
cnd.Parameters.AddWithValue("#Transferta", TransfertaBtn.SelectedValue);
cnd.Parameters.AddWithValue("#Depozita", DepoziteBtn.SelectedValue);
cnd.ExecuteNonQuery();
Response.Redirect("Home.aspx");
con.Close();
}
catch (Exception ex)
{
}
telerik:RadGrid ID="RadGrid1"
runat="server" AllowMultiRowSelection="True" AllowPaging="True" DataSourceID="SqlDataSource1" GridLines="Both" PageSize="5" >
<GroupingSettings CollapseAllTooltip="Collapse all groups" />
<ClientSettings>
<Selecting AllowRowSelect="True" />
</ClientSettings>
<MasterTableView>
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chkSelect" runat="server" Checked='<%# Eval("IsSelected") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Report" HeaderText="Report" ItemStyle-Width="150px" />
</telerik:GridTemplateColumn>
</Columns>
</MasterTableView>
</telerik:RadGrid>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks2014ConnectionString %>" SelectCommand="SELECT [ReportID], [Report] FROM [Report]"></asp:SqlDataSource>
<br />

To access the rows, loop through its DataItems. More about Accessing Cells and Rows
protected void Button1_Click(object sender, EventArgs e)
{
foreach (GridDataItem row in RadGrid1.Items)
{
string rowValue = row["ColumnUniqueName"].Text;
}
}
Better approach would be to create a method that takes few parameters to Update the SQL database. Once done, call it inside the ItemDataBound event of RadGrid (Differences Between ItemCreated and ItemDataBound). In this event you can access the row, its cells, get the necessary value and update the database row-by-row.
bool IsClicked = false;
protected void Button1_Click(object sender, EventArgs e)
{
IsClicked = true;
RadGrid1.Rebind();
}
protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
if (IsClicked && e.Item is GridDataItem)
{
updateDatabase(((GridDataItem)e.Item)["ColumnUniqueName"].Text);
}
}
protected void updateDatabase(string field)
{
// update SQL
}

Binding GridView Columns to CheckBoxList Dynamically in C#

I want to bind only Table Columns to CheckBoxList and then the selected columns should be displayed in a GridView.
My code so far is:
public void BindCheckBoxList(DataSet ds)
{
int i = 0;
foreach (DataColumn dc in ds.Tables[0].Columns)
{
ListItem li = new ListItem(dc.ToString(), i.ToString());
CheckBoxList1.Items.Add(li); i++;
}
}

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" DataKeyNames="HobbyId">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chkSelect" runat="server" Checked='<%# Eval("IsSelected") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Hobby" HeaderText="Hobby" ItemStyle-Width="150px" />
</Columns>
</asp:GridView>
<br />
<asp:Button ID="btnSave" runat="server" Text="Save" OnClick="Save" />
in aspx.cs code
private void BindGrid()
{
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("SELECT [HobbyId], [Hobby], [IsSelected] FROM Hobbies"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataTable dt = new DataTable())
{
sda.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
}
}
}
}
}

protected void mainGridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow &&
(e.Row.RowState == DataControlRowState.Normal ||
e.Row.RowState == DataControlRowState.Alternate))
{
if (e.Row.Cells[1].FindControl("selectCheckbox") == null)
{
CheckBox selectCheckbox = new CheckBox();
//Give id to check box whatever you like to
selectCheckbox.ID = "newSelectCheckbox";
e.Row.Cells[1].Controls.Add(selectCheckbox);
}
}
}
i think you use this code.

Here a complete example to hide GridView Columns based on a CheckBoxList.
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//fill the datatable from the database
DataTable dt = //fill the table here...
//bind the table to the grid
GridView1.DataSource = dt;
GridView1.DataBind();
//loop all the datatable columns to fill the checkboxlist
for (int i = 0; i < dt.Columns.Count; i++)
{
CheckBoxList1.Items.Insert(i, new ListItem(dt.Columns[i].ColumnName, dt.Columns[i].ColumnName, true));
}
}
}
protected void CheckBoxList1_TextChanged(object sender, EventArgs e)
{
//loop all checkboxlist items
foreach (ListItem item in CheckBoxList1.Items)
{
if (item.Selected == true)
{
//loop all the gridview columns
for (int i = 0; i < GridView1.Columns.Count; i++)
{
//check if the names match and hide the column
if (GridView1.HeaderRow.Cells[i].Text == item.Value)
{
GridView1.Columns[i].Visible = false;
}
}
}
}
}
And on the .aspx page
<asp:CheckBoxList ID="CheckBoxList1" runat="server" OnTextChanged="CheckBoxList1_TextChanged" AutoPostBack="true"></asp:CheckBoxList>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="field01" HeaderText="Column A" />
<asp:BoundField DataField="field02" HeaderText="Column B" />
<asp:BoundField DataField="field03" HeaderText="Column C" />
<asp:BoundField DataField="field04" HeaderText="Column D" />
<asp:BoundField DataField="field05" HeaderText="Column E" />
</Columns>
</asp:GridView>
Note that AutoGenerateColumns is set to false. If they are auto-generated the columns are not part of the GridView Columns Collection.
And of course HeaderText="xxx" must match the column names from the database that are stored in the DataTable.

Gridview not detecting checkboxes being checked

What i'm trying to do is execute some code when a checkbox in a gridview is checked, with the code being executed row by row. I debugged the code and every time returns false despite the checkboxes being checked. The code i'm trying to execute works if the conditional statement is removed.
protected void ShoppingCartButton_Click(object sender, EventArgs e)
{
Label1.Text = "HIH0HI";
OleDbConnection myconn = new OleDbConnection();
myconn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|ProjectDatabase.accdb";
string UserID = Session["UserID"].ToString();
StringBuilder sb3 = new StringBuilder();
foreach (GridViewRow row in GridView1.Rows)
{
string unpredictable = "";
bool hi = true;
unpredictable = row.Cells[1].Text;
CheckBox chk = row.Cells[0].Controls[1] as CheckBox;
hi = chk.Checked;
sb3.Append(hi.ToString());
if (hi==true)
{
string command1 = "insert into Cart ([Username],[GameID]) values (#Username, #GameID)";
OleDbCommand cmd = new OleDbCommand(command1, myconn);
cmd.Parameters.AddWithValue("#Username", UserID);
cmd.Parameters.AddWithValue("#GameID", unpredictable);
myconn.Open();
cmd.ExecuteNonQuery();
myconn.Close();
}
}
Label1.Text = sb3.ToString();
}
Markup for the button and the gridview
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="True" EmptyDataText ="Data Entry Error">
<Columns>
<asp:TemplateField HeaderText ="Add to Cart?">
<ItemTemplate>
<asp:CheckBox ID="checkbx" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:Button runat="server" id="ShoppingCartButton" Text="Add to shopping cart" OnClick="ShoppingCartButton_Click" />

This was a simple one. Have to enclose any data binding logic in
if (!IsPostBack)