DataGrid에서 반복되는 드롭 다운 상자 채우기

Question

DataGrid에서 반복되는 VB.net 드롭 다운 상자를 채우려고합니다. 기본적으로 이미지가 많아서 사용자가 드롭 다운 목록에서 항목을 선택해야 데이터베이스에 저장할 수 있습니다.

Dim DDLPlayColorList = New DropDownList 
DDLPlayColorList = dgImages.FindControl("DDLPlayColorList") 

Using oConn As New SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString) 
    Using cmd As New SqlCommand("doGetAllPlayColours", oConn) 
     cmd.CommandType = CommandType.StoredProcedure 
     oConn.Open() 
     Using dr As SqlDataReader = cmd.ExecuteReader() 
      DDLPlayColorList.DataSource = dr 
      DDLPlayColorList.DataTextField = "playColour" 
      DDLPlayColorList.DataValueField = "playColour" 
      DDLPlayColorList.DataBind() 
     End Using 
    End Using 
End Using 

findcontrol 함수를 사용하여 컨트롤을 찾은 다음 바인딩하려고 시도했지만 차이가 없습니다. 이 시도

<asp:DataGrid ID="dgImages" runat="server" Width="300" AutoGenerateColumns="false" ItemStyle-Width="300" ItemStyle-BorderWidth="3px"> 
    <Columns> 
     <asp:TemplateColumn ItemStyle-BackColor="#eaeaea" ItemStyle-Width="100"> 
      <ItemTemplate> 
       <a href="image.aspx?libid=<%#Container.DataItem("id")%>"> 
        <asp:Image ID="imgCategoryThumb" CssClass="lightbox-thumb" runat="server" Height="100" Width="100" ImageUrl='<%#Container.DataItem("path")%>' AlternateText="" /> 
       </a> 
       <asp:DropDownList id="DDLPlayColorList" runat="server" CssClass="textfield"> 
       </asp:DropDownList> 
      </itemtemplate> 
     </asp:TemplateColumn> 
    </Columns> 
</asp:DataGrid> 

Answer 1

: 여러 드롭 다운의 설정

Dim DDLPlayColorList As DropDownList = CType(dgImages.FindControl("DDLPlayColorList"), DropDownList) 

If DDLPlayColorList IsNot Nothing Then 
    Using oConn As New SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString) 
     Using cmd As New SqlCommand("doGetAllPlayColours", oConn) 
      cmd.CommandType = CommandType.StoredProcedure 
      oConn.Open() 
      Using dr As SqlDataReader = cmd.ExecuteReader() 
       DDLPlayColorList.DataSource = dr 
       DDLPlayColorList.DataTextField = "playColour" 
       DDLPlayColorList.DataValueField = "playColour" 
       DDLPlayColorList.DataBind() 

      End Using 
     End Using 
    End Using  
End If 

ID를 데이터 바인딩시 :

private void OnItemDataBound(object sender, DataGridItemEventArgs e) 
{ 
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) 
    { 
     Dim DDLPlayColorList As DropDownList = CType(e.Item.FindControl("DDLPlayColorList"), DropDownList) 
     DDLPlayColorList.ID = "DDLPlayColorList" & e.RowIndex.ToString() 
    } 
}