Question

I put Dropdownlist inside my GridView1, and the dropdownlist has values 0 and 1. What I want is: depending on the selected value from dropDownlist to update the column [Status] whit that value in my sql database???

protected void SQL_Update(object sender, GridViewUpdateEventArgs e){

SqlConnection conn = new SqlConnection();
conn.ConnectionString = @"Data Source=.\SQLEXPRESS;Initial Catalog=Korisnik;Integrated Security=True";
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "UPDATE RegistracijaKorisnik SET Status = " + ((DropDownList)GridView1.Rows[e.RowIndex].FindControl("DropDownList2")).SelectedValue; ;
cmd.Connection = conn;

conn.Open();
cmd.ExecuteNonQuery();

conn.Close();}

Answer 1

Let’s say you have the DropDownList and you bind it whichever way:

<asp:GridView ID="Grid" runat="server" OnRowUpdating="SQL_Update">
  <asp:TemplateField> 
    <EditItemTemplate>
      <asp:Button ID="Btn" runat="server" CommandName="Update" Text="Update" />
    </EditItemTemplate>
  </asp:TemplateField> 
  <asp:TemplateField>
    <EditItemTemplate>
      <asp:DropDownList ID="ddl" runat="server" /> 
    </EditItemTemplate> 
  </asp:TemplateField> 
</asp:GridView>

In your code behind, you should have an Updating event, specifically using GridViewUpdateEventArgs e

protected void SQL_Update(object sender, GridViewUpdateEventArgs e)
{
   /*
     You'll have to find the control in the GridView, using FindControl, and cast it to a DropDownList  
     Using ddl.SelectedValue isn't going to work
   */
   string sql = "Update table set Status = " + ((DropDownList)Grid.Rows[e.RowIndex].FindControl("ddl")).SelectedValue 
   //Other SQL logic here

   //Commit the database changes, using whichever SQL driver you have.
}