asp.net delete item from gridview - asp.net

Question

im using asp.net and sql server . i have a gridview in my asp form which is binded in my form load . i wrote a command on my delete button but it doesn't effect .
here is my code :
ASP.net :
<asp:TemplateField HeaderText="#" ItemStyle-CssClass="Company_Grid_Checkbox">
<ItemTemplate>
<asp:CheckBox ID="chkRow" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="fldCountPhoto" HeaderText="تعداد عکس" />
<asp:BoundField DataField="fldActive" HeaderText="موقعیت نمایش" />
<asp:BoundField DataField="fldPrice" HeaderText="قیمت" />
<asp:BoundField DataField="fldYear" HeaderText="سال" />
<asp:BoundField DataField="fldModel" HeaderText="مدل" />
<asp:BoundField DataField="fldCompany" HeaderText="کمپانی" />
<asp:BoundField DataField="fldTbl_UserCarID" HeaderText="ID" />
</Columns>
C# code :
protected void btn_del_Click(object sender, EventArgs e)
{
int i = 0;
foreach (GridViewRow row in GridView1.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
Label1.Text = (i++).ToString();
CheckBox chkRow = (row.Cells[0].FindControl("chkRow") as CheckBox);
if (chkRow.Checked)
{
string id = row.Cells[7].Text;
Label1.Text = "id";
SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["myconectionstring"].ConnectionString);
string sqlStatement = "DELETE FROM tbl_Usercar WHERE fldTbl_UserCarID = #fldTbl_UserCarID";
try
{
connection.Open();
SqlCommand cmd = new SqlCommand(sqlStatement, connection);
cmd.Parameters.AddWithValue("#fldTbl_UserCarID", id);
cmd.CommandType = CommandType.Text;
cmd.ExecuteNonQuery();
}
finally
{
connection.Close();
}
}
}
}
}
in the above codes i wrote only the part of gridview and i didnt write other parts .

Answer 1

My guess would be that you are binding the grid in Page_Load without checking for IsPostBack. This would cause your grid to rebind before your button click event, which resets your checkboxes.