Object reference not set to an instance of an object.

Question

Grid.aspx

 

<asp:GridView ID="statusgrdview" runat="server" AutoGenerateColumns="false" CellSpacing="10" CellPadding="4" ForeColor="#333333" GridLines="None" Width="1016px" OnSelectedIndexChanged="statusgrdview_SelectedIndexChanged" OnRowDataBound="statusgrdview_RowDataBound" OnRowCommand="statusgrdview_RowCommand">

<AlternatingRowStyle BackColor="White" />

<Columns>

      <asp:TemplateField ItemStyle-Width="20px">

               <ItemTemplate>

                        <a href="JavaScript:divexpandcollapse('div<%# Eval("ID") %>');">

                        <img id='imgdiv<%# Eval("ID") %>' width="70px" height="25px" border="0" src="Image/command.PNG"/></a>

                        <asp:TextBox ID="txtcommt" runat="server"></asp:TextBox>

                        <asp:Button ID="btncmd" runat="server" Text="Post" OnClick="txtcmd_Click" />

                        <asp:ImageButton ID="imglike" runat="server" ImageUrl="~/Image/like.png" Height="25px" Width="25px" OnClick="imglike_Click" />

                        <asp:Label ID="lbllike" runat="server"></asp:Label>

            </ItemTemplate>

         <ItemStyle Width="20px" VerticalAlign="Middle"></ItemStyle>

   </asp:TemplateField>

<asp:TemplateField>

         <ItemTemplate>

               <asp:Label ID="lblID" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "ID") %>'></asp:Label>

         </ItemTemplate>

</asp:TemplateField>

 

<asp:BoundField DataField="Post_data"/>

         <asp:TemplateField>

                  <ItemTemplate>

                              <tr>

                                    <td colspan="100%" style="background:#F5F5F5">

                                             <asp:DetailsView id="DetailsView1" DataKeyNames="ID" Runat="server" Width="300px" Font-Names="Calibri" OnItemInserting="DetailsView1_ItemInserting"/>

                                    </td>

                              </tr>

               </ItemTemplate>

         </asp:TemplateField>

   </Columns>

</asp:GridView>

 

Grid.aspx.cs

    

protected void txtcmd_Click(object sender, EventArgs e)

{

         string status = Convert.ToInt32(statusgrdview.DataKeys[e.RowIndex].Value);             

         string comments = ((TextBox)statusgrdview.FindControl("txtcommt")).Text;         Getting ERROR: Object reference not set to an instance of an object.       

         SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["connect"].ConnectionString);

         SqlCommand cmd = new SqlCommand();

         int ID = int.Parse(Session["Id"].ToString());

         TextBox box1 = (TextBox)statusgrdview.Rows[0].Cells[0].FindControl("txtcommt");

         string k = box1.Text;

         cmd.CommandType = CommandType.Text;

         cmd.CommandText = "insert into TBL_Comments(ID,comments) " + "values(" + ID + ",@comments);" + "select * from TBL_Comments";

         cmd.Parameters.Add("@comments", SqlDbType.VarChar).Value = comments;

         statusgrdview.DataSource = GetData(cmd);

         statusgrdview.DataBind();

}