填充gridview下拉列表

Question

我希望有人能帮助我。我有一个gridview和里面，每行有一个下拉列表。我希望根据行键值的值填充下拉菜单。

<asp:GridView ID="gvCart" runat="server" CssClass="table table-striped" DataKeyNames="UOMSCHDL" OnRowDataBound="gvCart_RowDataBound" 
    SelectMethod="gvCart_GetData" AutoGenerateColumns="false" DeleteMethod="gvCart_DeleteItem" AutoGenerateDeleteButton="true"> 
    <Columns> 
     <asp:TemplateField> 
      <HeaderTemplate>Item #</HeaderTemplate> 
      <ItemTemplate> 
       <%#Eval("ITEMNMBR")%> 
      </ItemTemplate> 
     </asp:TemplateField> 
     <asp:TemplateField> 
      <HeaderTemplate>UOM</HeaderTemplate> 
      <ItemTemplate> 
       <asp:DropDownList ID="ddlUOM" runat="server"AutoPostBack="true" SelectMethod="getUOM" CssClass="dropdown-toggle" 
              DataTextField="UOFM" DataValueField="UOFM" AppendDataBoundItems="true"> 
       </asp:DropDownList> 
      </ItemTemplate> 
     </asp:TemplateField> 
    </Columns> 
</asp:GridView> 

这里是填充下拉代码：

Public Function getUOM() As IEnumerable 
    'the following code has a red sqiggly under RowIndex because it isn't 
    'declared. I get that, but what do I use to get the RowIndex 

    Dim uom As String = gvCart.DataKeys(RowIndex).Value.ToString() 

    'this query works if I "hardcode" the where to = "roll" but I want 
    ' it to be dynamic 

    Dim query = From i In db.IV40202 
       Where i.UOMSCHDL = uom ' "roll" 
       Order By i.SEQNUMBR 
    Return query.ToList() 

End Function 

正如我在代码注释，我不知道如何获得的rowIndex。

非常感谢您的帮助。

我以为我会为任何感兴趣的人发布完整的解决方案。

<asp:TemplateField> 
    <HeaderTemplate>UOM</HeaderTemplate> 
     <ItemTemplate> 
      <asp:DropDownList ID="ddlUOM" runat="server" CssClass="dropdown-toggle"></asp:DropDownList> 
     </ItemTemplate> 

，并在后面的代码：

Public Function getUOM(uom As String) As IEnumerable 
    Dim myUOM As String = Trim(uom) 
    'ultimately this needs to be based on the uomschdl of each item 
    Dim query = From i In db.IV40202 
       Where i.UOMSCHDL = myUOM ' "roll" 
       Order By i.SEQNUMBR 
       Select New With { 
        .UOFM = i.UOFM 
        } 
    Return query.ToList() 

End Function 

Protected Sub gvCart_RowDataBound(sender As Object, e As GridViewRowEventArgs) 
    If e.Row.RowType = DataControlRowType.DataRow Then 
     Dim uom As String = gvCart.DataKeys(e.Row.RowIndex).Value.ToString() 
     Dim ddlUOM As DropDownList = TryCast(e.Row.FindControl("ddlUOM"), DropDownList) 
     ddlUOM.DataSource = getUOM(uom) 
     ddlUOM.DataTextField = "UOFM" 
     ddlUOM.DataValueField = "UOFM" 
     ddlUOM.DataBind() 
    End If 
End Sub 

Answer 1

你想在移动你到getUOM（rowIndex位置）调用您的gvCart_RowDataBound处理，像这样：

protected Sub gvCart_RowDataBound(Dim sender As Object, Dim e As GridViewRowEventArgs) 
    Dim rowIndex As Int = e.Row.RowIndex 
    getUOM(rowIndex)   
End Sub