checkbox_oncheckedchange event not firing in a gridview - asp.net

Question

I am trying to populate a gridview from a datatable in the code behind. In one of the columns dynamic checkboxes are generated. This is the code for gridview:
<asp:GridView ID="grdAdDetails" AutoGenerateColumns="False" runat="server">
<Columns>
<asp:BoundField HeaderText="Ad Id" DataField="Ad Id" Visible="false"></asp:BoundField>
<asp:BoundField HeaderText="Ad Type" DataField="Ad Type" />
<asp:TemplateField HeaderText="Ad">
<ItemTemplate>
<img src='<%#Eval("Ad") %>' height="150px" width="150px" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="Ad Url" DataField="Ad Url" />
<asp:TemplateField HeaderText="Active">
<ItemTemplate>
**<asp:CheckBox ID="chkAds" Checked='<%#((bool)Eval("Active"))%>' runat="server" OnCheckedChanged="chkAds_OnCheckedChanged" />**
</ItemTemplate>
</asp:TemplateField>
<%--<asp:BoundField HeaderText="Active" DataField="Active" />--%>
<asp:BoundField HeaderText="Node Id" DataField="Node Id" />
</Columns>
</asp:GridView>
and this is the datatable code from the code behind:
DataTable dt = new DataTable();
dt.Columns.Add("Ad Id", typeof(string));
dt.Columns.Add("Ad Type", typeof(string));
dt.Columns.Add("Ad", typeof(string));
dt.Columns.Add("Ad Url", typeof(string));
dt.Columns.Add("Active", typeof(bool));
dt.Columns.Add("Node Id", typeof(string));
DataRow dr = dt.NewRow();
con.Open();
SqlCommand cmd = new SqlCommand("[temp].[somename]", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#nodeId", 1088);
cmd.Parameters.AddWithValue("#adType", 0);
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
dr["Ad Id"] = reader[0].ToString();
dr["Ad Type"] = reader[1].ToString();
dr["Ad"] = reader[2].ToString();
dr["Ad Url"] = reader[3].ToString();
dr["Active"] =Convert.ToBoolean(reader[4]);
dr["Node Id"] = reader[5].ToString();
}
dt.Rows.Add(dr);
}
con.Close();
grdAdDetails.DataSource = dt;
grdAdDetails.DataBind();
checkbox onchanged code:
public void chkAds_OnCheckedChanged(object sender, EventArgs e)
{
int selRowIndex = ((GridViewRow)(((CheckBox)sender).Parent.Parent)).RowIndex;
CheckBox cb = (CheckBox)grdAdDetails.Rows[selRowIndex].FindControl("chkAds");
if (cb.Checked)
{
//some code here
}
}
When I check/uncheck the checkbox, the OnCheckedChanged event is not firing. Can anyone help with that?

Answer 1

I have added a sample here plz chk it.
view:
<asp:GridView ID="GridView1" runat="server" DataKeyNames="ID" AutoGenerateColumns="false"
OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowDeleting="GridView1_RowDeleting"
OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:checkbox id="CheckBox1" runat="server" AutoPostBack="true" oncheckedchanged="CheckBox1_CheckedChanged" />
</ItemTemplate>
<EditItemTemplate>
<asp:FileUpload ID="FileUpload2" runat="server" />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="File Name">
<ItemTemplate>
<asp:Image ID="Image1" runat="server" ImageUrl='<%#Eval("fpath")%>' />
</ItemTemplate>
<EditItemTemplate>
<asp:FileUpload ID="FileUpload2" runat="server" />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Description">
<ItemTemplate>
<%#Eval("desc1")%>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtdesc" runat="server" Text='<%#Eval("desc1")%>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:CommandField HeaderText="Modify" ShowEditButton="true" EditText="Edit">
<ControlStyle Width="50" />
</asp:CommandField>
<asp:TemplateField HeaderText="Delete">
<ItemTemplate>
<asp:LinkButton ID="lnkDelete" CommandName="Delete" runat="server" OnClientClick="return confirm('Are you sure you want to delete this record?');">Delete</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
C#
using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
public partial class _Default : System.Web.UI.Page
{
SqlConnection sqlcon = new SqlConnection(ConfigurationManager.ConnectionStrings["Con"].ConnectionString);
SqlCommand sqlcmd = new SqlCommand();
SqlDataAdapter da = new SqlDataAdapter();
DataTable dt = new DataTable();
String fname, fpath, desc;
String spath;
protected void Page_Load(object sender, EventArgs e)
{
Label1.Text = "";
if (!Page.IsPostBack)
{
LoadGrid();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
//Check File is available in Fileupload control and then upload to server path
fname = FileUpload1.FileName;
spath = #"~\Uploaded\" + FileUpload1.FileName;
fpath = Server.MapPath("Uploaded");
fpath = fpath + #"\" + FileUpload1.FileName;
desc = TextBox2.Text;
if (System.IO.File.Exists(fpath))
{
Label1.Text = "File Name already exists!";
return;
}
else
{
FileUpload1.SaveAs(fpath);
}
//Store details in the SQL Server table
StoreDetails();
TextBox2.Text = "";
LoadGrid();
}
else
{
Label1.Text = "Please select file!";
}
}
void StoreDetails()
{
String query;
query = "insert into fileDet(fname,fpath,desc1) values('" + fname + "','" + spath + "','" + desc + "')";
sqlcon.Open();
sqlcmd = new SqlCommand(query, sqlcon);
sqlcmd.CommandType = CommandType.Text;
sqlcmd.ExecuteNonQuery();
sqlcon.Close();
LoadGrid();
}
void LoadGrid()
{
sqlcon.Open();
sqlcmd = new SqlCommand("select * from fileDet", sqlcon);
da = new SqlDataAdapter(sqlcmd);
dt.Clear();
da.Fill(dt);
if (dt.Rows.Count > 0)
{
GridView1.DataSource = dt;
GridView1.DataBind();
}
else
{
GridView1.DataBind();
}
sqlcon.Close();
}
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
LoadGrid();
}
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GridView1.EditIndex = -1;
LoadGrid();
}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
String ID;
ID = GridView1.DataKeys[e.RowIndex].Value.ToString();
sqlcmd = new SqlCommand("select * from fileDet where ID='" + ID + "'", sqlcon);
sqlcon.Open();
da = new SqlDataAdapter(sqlcmd);
da.Fill(dt);
if (dt.Rows.Count > 0)
{
if (System.IO.File.Exists(Server.MapPath(dt.Rows[0][2].ToString())))
{
System.IO.File.Delete(Server.MapPath(dt.Rows[0][2].ToString()));
}
}
sqlcmd = new SqlCommand("delete from fileDet where ID='" + ID + "'", sqlcon);
sqlcmd.ExecuteNonQuery();
sqlcon.Close();
LoadGrid();
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridViewRow row = GridView1.Rows[e.RowIndex];
string ID;
ID = GridView1.DataKeys[e.RowIndex].Value.ToString();
FileUpload flname = (FileUpload)row.FindControl("FileUpload2");
if (flname.HasFile)
{
fname = flname.FileName;
spath = #"~\Uploaded\" + flname.FileName;
fpath = Server.MapPath("Uploaded");
fpath = fpath + #"\" + flname.FileName;
if (System.IO.File.Exists(fpath))
{
Label1.Text = "File Name already exists!";
return;
}
else
{
flname.SaveAs(fpath);
}
}
else
{
Label1.Text = "Please select file!";
}
TextBox desc1 = (TextBox)row.FindControl("txtdesc");
string query;
query = "update fileDet set fname='" + fname + "',fpath='" + spath + "',desc1='" + desc1.Text + "' where ID='" + ID + "'";
sqlcon.Open();
sqlcmd = new SqlCommand(query, sqlcon);
sqlcmd.CommandType = CommandType.Text;
sqlcmd.ExecuteNonQuery();
sqlcon.Close();
GridView1.EditIndex = -1;
LoadGrid();
}
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
CheckBox chk = (CheckBox)sender;
GridViewRow gr = (GridViewRow)chk.Parent.Parent;
// lblmsg.Text = GridView1.DataKeys[gr.RowIndex].Value.ToString();
//lblmsg.Text = "Hello";
}
}