find the control id

[rummer]

protected void _bindTopicPage()
{

    int \_lowerLimit = \_pageIndex \* \_pageCount;
    int \_upperLimit = (\_pageIndex \* \_pageCount) + (\_pageCount - 1);

    string \_str;

    if (Convert.ToInt32(Request.QueryString\["UserID"\]) != 0)
    {
        \_str = "SELECT  dbo.tblUser.FirstName, dbo.tblUserMessage.SubmittedOn, dbo.tblUserProfile.UserID, dbo.tblUserProfile.ImageUrl, dbo.tblUserMessage.Message FROM dbo.tblUser INNER JOIN  dbo.tblUserMessage ON dbo.tblUser.ID = dbo.tblUserMessage.MessageFrom INNER JOIN  dbo.tblUserProfile ON dbo.tblUserMessage.MessageFrom = dbo.tblUserProfile.UserID where dbo.tblUserMessage.MessageTo=" + Convert.ToInt32(Request.QueryString\["UserID"\]) + " order by \[tblUserMessage\].ID desc";
    }
    else
    {
        \_str = "SELECT  dbo.tblUser.FirstName, dbo.tblUserMessage.SubmittedOn, dbo.tblUserProfile.UserID, dbo.tblUserProfile.ImageUrl, dbo.tblUserMessage.Message FROM dbo.tblUser INNER JOIN  dbo.tblUserMessage ON dbo.tblUser.ID = dbo.tblUserMessage.MessageFrom INNER JOIN  dbo.tblUserProfile ON dbo.tblUserMessage.MessageFrom = dbo.tblUserProfile.UserID where dbo.tblUserMessage.MessageTo=" + Convert.ToInt32(Session\["UserID"\]) + " order by \[tblUserMessage\].ID desc";
    }
    SqlDataAdapter da = new SqlDataAdapter(\_str, con);
    DataSet ds = new DataSet();
    da.Fill(ds);

    StringBuilder \_sb = new StringBuilder();
    int \_count = ds.Tables\[0\].Rows.Count;

    ViewState\["\_cccount"\] = ds.Tables\[0\].Rows.Count;

    if (\_upperLimit >= \_count)
        \_upperLimit = \_count - 1;

    for (int i = \_lowerLimit; i <= \_upperLimit; i++)
    {
        \_sb.Append("<div class='scrapGrayBg'>");
        \_sb.Append("<div class='scrapUser'><a href='Userprofile.aspx?UserID=" + ds.Tables\[0\].Rows\[i\]\["UserID"\] + "'><img src='cropimages/" + ds.Tables\[0\].Rows\[i\]\["ImageUrl"\] + "' width='50px' height='50px' alt='' class='imgBdr' /></a><br /><**input name='' id='chk"+i+"' runat='server' type='checkbox'**  class='scrapCheck' value='' /></div>");
        \_sb.Append("<div class='scrapRt'>");
        \_sb.Append("<div class='scrapHdSce'>");
        \_sb.Append("<div class='scrapHd'><a href='Userprofile.aspx?UserID=" + ds.Tables\[0\].Rows\[i\]\["UserID"\] + "'>" + ds.Tables\[0\].Rows\[i\]\["FirstName"\] + ":</a></div>");
        \_sb.Append("<div class='scrapDelet'>" + ShowDateTime(ds.Table

[Sandeep Mewara]

rummer wrote:

CheckBox chk = (CheckBox)page.FindControl("chk0"); it showing null

Have you given runat="server" to the checkbox you are trying to use? If it's a html checkbox then you need to give runat="server" and then caste it into HtmlCheckbox instead of just Checkbox. If this does not resolves it then post your aspx page where you have this checkbox.