获取动态下拉列表选择的选定行索引

Question

我知道这个问题有点不稳定，也许有误导性，但我有一个网格视图，行上有下拉列表。我为 SelectedIndexChanged 创建了一个 AddHandler 和一个委托，它到达了子目录。这是代码：

AddHandler ddlmgr.SelectedIndexChanged, AddressOf ddlmgr_SelectedIndexChanged
Public Delegate Sub DropDownList_SelectedIndexChanged(ByVal sender As Object, ByVal e As DropDownList_SelectedIndexChanged)

Protected Sub ddlmgr_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)


End Sub

如果未调用 GridView_RowCommand，如何获取行的 Id？

Answer 1

大工作 工作绝对没问题，我

DropDownList ddl = (DropDownList)sender;
Control p = ddl.Parent;
//you are going to loop because the immediate
//parent may not be the repeater item but instead a 
//container control of some kind (say a template)
while (p.GetType() != typeof(RepeaterItem))
{     
  p = p.Parent;     
  if (p == null) 
      return; //we have reached the top of the control tree
}
RepeaterItem ri = (RepeaterItem)p;
int index = ri.ItemIndexreturn index;

Answer 2

您将需要做一些跑腿工作，因为如果不写出代码并在此处自行测试，我无法提供 100% 的细节，目前我无法做到这一点，但代码应该遵循这些思路。

在 ddlmgr_SelectedIndexChaged 内，

1. 将您的发件人投射到 DropDownList
2. 访问下拉列表的部分属性。
3. 检查它是一个 GridItem （或 Repeateritem 或任何一个，你明白的）
4. 如果是，则获取项目 itemindex。如果不访问其父属性。
5. 继续，直到找到 Row 对象。

Answer 3

希望这有助于。如果不是这样，也许有人多一点自由访问可以附和

DropDownList ddl = (DropDownList)sender;
Control p = ddl.Parent;

//you are going to loop because the immediate 
//parent may not be the repeater item but instead a 
//container control of some kind (say a template)
while (p.GetType() != typeof(RepeaterItem))
{
     p = p.Parent;
     if (p == null) return; //we have reached the top of the control tree
}
RepeaterItem ri = (RepeaterItem)p;
int index = ri.ItemIndex
return index;

Answer 4

的DropDownList ddltxt =（DropDownList的）发送者;         串TEMP2 = ddltxt.SelectedItem.Text;         串TEMP3 = ddltxt.SelectedItem.Value;         串温度= ddltxt.ID.ToString（）;         INT strlength = temp.Length;         串strLastchar = temp.Substring（strlength - 1，1）;         INT intlastchar = int.Parse（strLastchar.ToString（））;         串commonpart = temp.Substring（0，strlength - 1）;

    if (intlastchar == 1)
    {
        string targetdropdownid = commonpart + "2";
        DropDownList targetlist = (DropDownList)TableRow11.FindControl(targetdropdownid);
        using (conn = new SqlConnection(ConnectionString))