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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();

C# GridView Dynamic CheckBox Disappearing

I have a fairly simple application which returns a list of failed reports with an ID, Name and Time Bound fields and Checkbox template field on the left.
I have a 'Reschedule' button which when pressed, should pick up the rows where the checkbox has been ticked and process them.
The GridView loads up successfully and I can select/unselect the CheckBoxes but when I press the 'Reschedule' button and return to the code, the checkboxes no longer exist.
I know this is related to Dynamic Controls/Postback and that the Checkboxes need to be re-created and I've tried numerous suggestions to previous similar questions but nothing has worked
GridView - AutoGenerate Columns False (tried true)
Button - OnClientClick="" (tried return false)
The fields are initially created and bound to a data table (the data table has 3 columns mapping to the 3 Bound fields) like this:-
TemplateField tfield = new TemplateField();
failedSchedulesGridView.Columns.Add(tfield);
BoundField bfield1 = new BoundField();
bfield1.HeaderText = "SI_ID";
bfield1.DataField = "si_id";
failedSchedulesGridView.Columns.Add(bfield1);
BoundField bfield2 = new BoundField();
bfield2.HeaderText = "SI_NAME";
bfield2.DataField = "si_name";
failedSchedulesGridView.Columns.Add(bfield2);
BoundField bfield3 = new BoundField();
bfield3.HeaderText = "SI_UPDATE_TS";
bfield3.DataField = "si_update_ts";
failedSchedulesGridView.Columns.Add(bfield3);
failedSchedulesGridView.DataSource = dt;
failedSchedulesGridView.DataBind();
Page_Load
As can be seen I've tried recreating the GridView columns here but it didn't work and is commented out
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
//TemplateField tfield = new TemplateField();
//failedSchedulesGridView.Columns.Add(tfield);
//BoundField bfield1 = new BoundField();
//bfield1.HeaderText = "SI_ID";
//bfield1.DataField = "si_id";
//failedSchedulesGridView.Columns.Add(bfield1);
//BoundField bfield2 = new BoundField();
//bfield2.HeaderText = "SI_NAME";
//bfield2.DataField = "si_name";
//failedSchedulesGridView.Columns.Add(bfield2);
//BoundField bfield3 = new BoundField();
//bfield3.HeaderText = "SI_UPDATE_TS";
//bfield3.DataField = "si_update_ts";
//failedSchedulesGridView.Columns.Add(bfield3);
}
failedSchedulesGridView.DataSource = dt;
failedSchedulesGridView.DataBind();
}
OnRowDataBound
protected void OnRowDataBound(Object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType != DataControlRowType.Header)
{
cbx++;
CheckBox cb = new CheckBox();
cb.ID = "cb" + cbx;
e.Row.Cells[0].Controls.Add(cb);
}
}
The Code fails when I try to access the Checkboxes after the 'Reschedule' button is pressed because the checbox is not found :-
protected void ReschedulePB2_Click(object sender, EventArgs e)
{
int i = 0;
foreach (GridViewRow row in failedSchedulesGridView.Rows)
{
i++;
string cbName = "cb" + i;
CheckBox cb = (CheckBox)row.Cells[0].FindControl(cbName);
if (cb.Checked)

try this
Write this in your aspx page
<asp:GridView ID="failedSchedulesGridView" runat="server" AutoGenerateColumns="False" OnRowDataBound="GridView1_RowDataBound" Width="850px" onrowcommand="GridView1_RowCommand">
<Columns>
<asp:TemplateField >
<HeaderTemplate>
<asp:CheckBox ID="cbHeader" runat="server" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="cbItem" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="si_id" HeaderText="SI_ID" SortExpression="si_id" />
<asp:BoundField DataField="si_name" HeaderText="SI_NAME" SortExpression="si_name" />
<asp:BoundField DataField="si_update_ts" HeaderText="SI_UPDATE_TS" SortExpression="si_update_ts" />
</Columns>
</asp:GridView>
your page load should look like this
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
failedSchedulesGridView.DataSource = dt;
failedSchedulesGridView.DataBind();
}
}
your reschedule click would be
protected void ReschedulePB2_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in failedSchedulesGridView.Rows)
{
CheckBox cb = (CheckBox)row.Cells[0].FindControl("cbItem");
if (cb.Checked)

Gridview changing text in a button column after data bind

I have a GridView in a ASP.NET web application, in which I have added buttons in each row:
<asp:GridView ID="gridviewdatadosen" runat="server" AutoGenerateColumns="False" CssClass="table table-striped table-bordered table-hover" OnRowDataBound="gridviewdatadosen_RowDataBound" OnSelectedIndexChanged="gridviewdatadosen_SelectedIndexChanged" OnRowCommand="gridviewdatadosen_RowCommand">
<Columns>
<asp:BoundField DataField="NIK" HeaderText="NIK" SortExpression="NIK"></asp:BoundField>
<asp:BoundField DataField="NIDN" HeaderText="NIDN" SortExpression="NIDN"></asp:BoundField>
<asp:BoundField DataField="NAMA" HeaderText="NAMA" SortExpression="NAMA"></asp:BoundField>
<asp:BoundField DataField="Alamat" HeaderText="Alamat" SortExpression="Alamat"></asp:BoundField>
<asp:TemplateField ShowHeader="false">
<ItemTemplate>
<asp:Button ID="btnstatus" runat="server" Text="Aktif" CssClass="btn btn-primary" CommandName="aktifasi" CommandArgument='<%# Eval("NIK") %>'/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
I fill the datagridview on the server side. I filled it with taking the data in the database.
DataTable dt = new DataTable();
DataTable dt1 = new DataTable();
SqlConnection conn = new SqlConnection(#"Data Source=localhost;Initial Catalog=SKRIPSI;User ID=sa;Password=sa");
conn.Open();
string ngisi = "SELECT [nik] as 'NIK' , [nidn] as 'NIDN', [nama] as 'NAMA', [alamat] as 'Alamat' FROM [dosen]";
SqlCommand comm = new SqlCommand(ngisi, conn);
dt.Load(comm.ExecuteReader());
conn.Close();
gridviewdatadosen.DataSource = dt;
gridviewdatadosen.DataBind();
int tmp = dt.Rows.Count;
after I fill the datagridview, I wanted to check the status of dosen whether he is active or not by select id and status of dosen.
conn.Open();
string check = "SELECT nik, status FROM [dosen]";
comm = new SqlCommand(check, conn);
dt1.Load(comm.ExecuteReader());
conn.Close();
I have tried to change the existing text on the button but did not succeed.
for (int i = 0; i < tmp; i++)
{
if (dt1.Rows[i][1].ToString() == "Aktif")//check the dosen aktif or not
{
for (int j = 0; j < tmp; j++)
{
if (dt.Rows[j][0].ToString() == dt1.Rows[i][0].ToString())// check nik where status = 'Aktif'
{
// I want to change the button in each row. if he 'Aktif' then the text in button will change to be 'aktif'
//do not know what to do
}
}
}
}
I want to change the button in each row. if he 'Aktif' then the text in button will change to be 'aktif'. help me to solve this problem. Sorry if my english or my explain is bad. Thank You

You can loop all the rows, find the Button and change the Text based on the values in dt1
foreach (GridViewRow row in GridView1.Rows)
{
//find the button in the row with findcontrol and cast back to a button
Button button = row.FindControl("btnstatus") as Button;
//check dt1 and set button text
button.Text = "Active";
}
Or you can do the same on the GridView databinding with the OnRowDataBound event.
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
//find the button in the row with findcontrol and cast back to a button
Button button = e.Row.FindControl("btnstatus") as Button;
//check dt1 and set button text
button.Text = "Active";
}
}

how to get dynamic check box status an asp in a gridview in asp webform?

i have a gridview in a asp.net webform and i add it a check box column like this (the dataTable first column(0) is empty in sql data source and i add check boxes on the column cells):
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (rowNum != 0)//except first row
{
CheckBox cb = new CheckBox();
cb.Enabled = true;
e.Row.Cells[0].Controls.Add(cb);//row[0]=first clmn-and this event happend for all rows
}
rowNum++;
}
now i have a dynamic check box column! and user should check some of them and click the submit then i need the row number of the checked check boxes.
how can i do this?
i tried this before:
DataTable editTable = new DataTable();
editTable.Rows.Add(GridView1.Rows[0]);
var x = editTable.Rows[0][0];
but the x cannot get the check box true or false! it seems that getting me the original field under the check box content.
regards.

Instead of creating the controls dynamically which in most cases results in a lot of trouble, you could add the CheckBoxes in one or more template columns. The following sample shows how to add a checkbox in a template column and how to retrieve the value afterwards:
<asp:GridView ID="gridView" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chb" runat="server" />
<asp:HiddenField ID="hiddenId" runat="server"
Value='<%# DataBinder.Eval(Container.DataItem, "Id") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Text" />
</Columns>
</asp:GridView>
In my sample, I've bound some data to the GridView:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
var dt = GetData();
gridView.DataSource = dt;
gridView.DataBind();
}
}
private DataTable GetData()
{
var dt = new DataTable();
dt.Columns.Add("Id", typeof(int));
dt.Columns.Add("Text", typeof(string));
for (int i = 0; i < 10; i++)
dt.Rows.Add(new object[] { i, "Test text " + i.ToString() });
return dt;
}
If you need to set the value, you can do so in the RowDatabound event. The following code shows how to retrieve the value of the Checkbox controls:
protected void btn_Click(object sender, EventArgs e)
{
List<int> checkedIds = new List<int>();
foreach(GridViewRow row in gridView.Rows.OfType<GridViewRow>()
.Where(x => x.RowType == DataControlRowType.DataRow))
{
var hiddenId = (HiddenField)row.Cells[0].FindControl("hiddenId");
var checkBox = (CheckBox) row.Cells[0].FindControl("chb");
if (checkBox.Checked)
checkedIds.Add(int.Parse(hiddenId.Value));
}
}

select all rows in gridview using checkbox and delete on button click

I have a ckeck box field in grid view header.On checking this Check box all the check boxes
in grid view gets checked. Now i want to delete all the rows on button click.
Code for the check box in my aspx page is as follows:
<HeaderTemplate>
Select All: <asp:CheckBox ID="chkboxSelectAll" AutoPostBack="true" OnCheckedChanged="chkboxSelectAll_CheckedChanged"
runat="server"/>
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="chkEmp" runat="server"></asp:CheckBox>
</ItemTemplate></asp:TemplateField>
In my code behind i have tried this but its not working:
also In my Grid view DataKeyNames="id" and bindgrid() method is working fine.
For selecting all rows:
protected void chkboxSelectAll_CheckedChanged(object sender, EventArgs e)
{
CheckBox ChkBoxHeader = (CheckBox)Grd.HeaderRow.FindControl("chkboxSelectAll");
foreach (GridViewRow row in Grd.Rows)
{
CheckBox ChkBoxRows = (CheckBox)row.FindControl("chkEmp");
if (ChkBoxHeader.Checked == true)
{
ChkBoxRows.Checked = true;
}
}
For deleting all selected rows
protected void btn_click(object sender, EventArgs e)
{
CheckBox ChkBoxHeader = (CheckBox)Grd.HeaderRow.FindControl("chkboxSelectAll");
foreach (GridViewRow row in Grd.Rows)
{
// Only look in data rows, ignore header and footer rows
if (row.RowType == DataControlRowType.DataRow)
{
CheckBox ChkBoxRows = (CheckBox)row.FindControl("chkEmp");
if (ChkBoxHeader.Checked == true)
{
ChkBoxRows.Checked = true;
var id = Grd.DataKeys[row.RowIndex].Value;
SqlConnection con = new SqlConnection(constr);
string qry = "delete from empdetail where id=#id";
SqlCommand cmd = new SqlCommand(qry, con);
cmd.Parameters.AddWithValue("#id", id);
con.Open();
cmd.ExecuteNonQuery();
con.Close();
bindgrid();
}
}
}
}
Please Help me. Error i got is "Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index"

Your first problem is that you are searching for the chkEmp check box, but it does not exist in the header row, because foreach (GridViewRow row in Grd.Rows) will loop through all rows in the grid (including header, data and footer rows).
The ItemTemplate in your grid view markup applies to rows of type DataRow, so you need to restrict your searching for chkEmp to just data rows, like this:
protected void chkboxSelectAll_CheckedChanged(object sender, EventArgs e)
{
CheckBox ChkBoxHeader = (CheckBox)Grd.HeaderRow.FindControl("chkboxSelectAll");
foreach (GridViewRow row in Grd.Rows)
{
// Only look in data rows, ignore header and footer rows
if (row.RowType == DataControlRowType.DataRow)
{
CheckBox ChkBoxRows = (CheckBox)row.FindControl("chkEmp");
if (ChkBoxHeader.Checked == true)
{
ChkBoxRows.Checked = true;
var id = Grd.DataKeys[row.RowIndex].Value;
SqlConnection con = new SqlConnection(constr);
string qry = "delete from empdetail where id=#id";
SqlCommand cmd = new SqlCommand(qry, con);
cmd.Parameters.AddWithValue("#id", id);
con.Open();
cmd.ExecuteNonQuery();
con.Close();
bindgrid();
}
else
{
ChkBoxRows.Checked = false;
}
}
}
}

<asp:GridView ID="GrdAtt" runat="server" CssClass="table table-small-font table-bordered table-striped" Font-Size="Small" EmptyDataRowStyle-ForeColor="#cc0000" HeaderStyle-Font-Size="10" HeaderStyle-Font-Names="Arial" HeaderStyle-Font-Italic="true"
AutoGenerateColumns="False" EmptyDataText="No Data Found" OnRowDataBound="GrdEmplistFromAtt_RowDataBound"
HeaderStyle-ForeColor="#990000">
<Columns>
<asp:TemplateField HeaderText=" " HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center"
ItemStyle-Width="25px">
<HeaderTemplate>
<asp:CheckBox ID="chkAll" runat="server" AutoPostBack="true" OnCheckedChanged="chkAll_CheckedChanged" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="chkSingle" runat="server" />
</ItemTemplate>
<HeaderStyle HorizontalAlign="Center"></HeaderStyle>
<ItemStyle HorizontalAlign="Center" Width="10px"></ItemStyle>
</asp:TemplateField>
</Columns>
<HeaderStyle HorizontalAlign="Justify" VerticalAlign="Top"
Font-Bold="true" />
<RowStyle Font-Size="Small" Height="1" Font-Italic="true" />
</asp:GridView>
protected void chkAll_CheckedChanged(object sender, EventArgs e)
{
CheckBox chk_All = (CheckBox)GrdAtt.HeaderRow.FindControl("chkAll");
if (chk_All.Checked == true)
{
foreach (GridViewRow gvr in GrdEmplistFromAtt.Rows)
{
CheckBox chk_Single = (CheckBox)gvr.FindControl("chkSingle");
if (chk_Single.Visible == true)
{
chk_Single.Checked = true;
lblSelectedRecord.InnerText = (Convert.ToInt32(lblSelectedRecord.InnerText) + 1).ToString();
}
}
}
else
{
foreach (GridViewRow gvr in GrdEmplistFromAtt.Rows)
{
CheckBox chk_Single = (CheckBox)gvr.FindControl("chkSingle");
chk_Single.Checked = false;
lblSelectedRecord.InnerText = "0";
}
}
}