GRID中使用ASP的DropDownList控件，OnSelectedIndexChanged只对第一行起

大鸟打小鸟

三石大人您好！我在GRID中使用了ASP的DropDownList控件，但是在使用中OnSelectedIndexChanged只对第一行起作用！这是什么原因呢？

1. <form id="form1" runat="server">
   
2. <ext:PageManager ID="PageManager1" runat="server" AjaxAspnetControls="aspDdl,aspTb" />
   
3. <ext:Grid ID="gridTest" ShowBorder="true" ShowHeader="true" EnableCheckBoxSelect="True" ForceFitAllTime="True"
   
4. Title="明细" EnableMultiSelect="True" EnableRowNumber="True" runat="server" OnRowDataBound="gridTest_RowDataBound">
   
5. <Columns>
   
6. <ext:TemplateField HeaderText="选择" Width="100px">
   
7. <ItemTemplate>
   
8. <asp:DropDownList runat="server" ID="aspDdl" Width="80%" OnSelectedIndexChanged="aspDdl_SelectedIndexChanged" AutoPostBack="True"></asp:DropDownList>
   
9. </ItemTemplate>
   
10. </ext:TemplateField>
    
11. 
    
12. <ext:TemplateField HeaderText="文本" Width="100px" >
    
13. <ItemTemplate>
    
14. <asp:TextBox ID="aspTb" runat="server" Width="80%" TabIndex='<%# Container.DataItemIndex + 10 %>'
    
15. Text='<%# Eval("Description") %>'></asp:TextBox>
    
16. </ItemTemplate>
    
17. </ext:TemplateField>
    
18. 
    
19. </Columns>
    
20. </ext:Grid>
    
21. 
    
22. 
    
23. 
    
24. </form>

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1. public partial class WebForm1 : System.Web.UI.Page
   
2. {
   
3. protected void Page_Load(object sender, EventArgs e)
   
4. {
   
5. if (IsPostBack)
   
6. return;
   
7. 
   
8. gridTest.DataSource = GetDdlBind();
   
9. gridTest.DataBind();
   
10. }
    
11. 
    
12. protected void gridTest_RowDataBound(object sender, FineUI.GridRowEventArgs e)
    
13. {
    
14. GridRow row = gridTest.Rows[e.RowIndex];
    
15. 
    
16. var aspDdlCompany = (AspNet.DropDownList)row.FindControl("aspDdl");
    
17. aspDdlCompany.DataSource = GetDdlBind();
    
18. aspDdlCompany.DataTextField = "Product";
    
19. aspDdlCompany.DataValueField = "Version";
    
20. aspDdlCompany.DataBind();
    
21. 
    
22. }
    
23. 
    
24. protected void aspDdl_SelectedIndexChanged(object sender, EventArgs e)
    
25. {
    
26. GridRow row = gridTest.Rows[gridTest.SelectedRowIndex];
    
27. var aspDdl = (AspNet.DropDownList)row.FindControl("aspDdl");
    
28. var aspTb = (AspNet.TextBox)row.FindControl("aspTb");
    
29. 
    
30. aspTb.Text = aspDdl.SelectedValue;
    
31. }
    
32. 
    
33. 
    
34. private DataTable GetDdlBind()
    
35. {
    
36. DataTable tblDatas = new DataTable("Datas");
    
37. DataColumn dc = null;
    
38. dc = tblDatas.Columns.Add("ID", Type.GetType("System.Int32"));
    
39. dc.AutoIncrement = true;//自动增加
    
40. dc.AutoIncrementSeed = 1;//起始为1
    
41. dc.AutoIncrementStep = 1;//步长为1
    
42. dc.AllowDBNull = false;//
    
43. 
    
44. dc = tblDatas.Columns.Add("Product", Type.GetType("System.String"));
    
45. dc = tblDatas.Columns.Add("Version", Type.GetType("System.String"));
    
46. dc = tblDatas.Columns.Add("Description", Type.GetType("System.String"));
    
47. 
    
48. DataRow newRow;
    
49. newRow = tblDatas.NewRow();
    
50. newRow["Product"] = "大话西游";
    
51. newRow["Version"] = "2.0";
    
52. newRow["Description"] = "我很喜欢";
    
53. tblDatas.Rows.Add(newRow);
    
54. 
    
55. newRow = tblDatas.NewRow();
    
56. newRow["Product"] = "梦幻西游";
    
57. newRow["Version"] = "3.0";
    
58. newRow["Description"] = "比大话更幼稚";
    
59. tblDatas.Rows.Add(newRow);
    
60. return tblDatas;
    
61. }
    
62. }

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sanshi

测试了一下，两行中的下拉列表都能触发，只不过在更新模板列之后，要手工调用 UpdateTemplateFields：

1. protected void aspDdl_SelectedIndexChanged(object sender, EventArgs e)
   
2.         {
   
3.             GridRow row = gridTest.Rows[gridTest.SelectedRowIndex];
   
4.             var aspDdl = (AspNet.DropDownList)row.FindControl("aspDdl");
   
5.             var aspTb = (AspNet.TextBox)row.FindControl("aspTb");
   
6. 
   
7.             aspTb.Text = aspDdl.SelectedValue;
   
8. 
   
9.             gridTest.UpdateTemplateFields();
   
10.         }

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大鸟打小鸟

原来如此，谢谢三石了{:soso_e100:}