Question

希望你一切顺利

我有一个网格视图

<asp:TemplateField HeaderText="Refrence No">
                        <ItemTemplate>
                            <asp:TextBox ID="RefrenceNo" runat="server" Width="50px"></asp:TextBox>
                        </ItemTemplate>
                    </asp:TemplateField>

                    <asp:TemplateField HeaderText="Projects">
                        <ItemTemplate>
                            <asp:DropDownList ID="Projects" AutoPostBack="true" OnSelectedIndexChanged ="onTextChange" runat="server" Width="100px"></asp:DropDownList>
                        </ItemTemplate>
                    </asp:TemplateField>

并在代码中

Protected Sub onTextChange(ByVal sender As Object, ByVal e As EventArgs)
    Dim row As GridViewRow = GridView2.Rows(GridView2.EditIndex)

    Dim ddlProjects As DropDownList = CType(row.FindControl("Projects"), DropDownList)
    Dim txtProjects As TextBox = CType(row.FindControl("RefrenceNo"), TextBox)

    txtProjects.Text = ddlProjects.Text
End Sub

我想用下拉列表更改值填充文本框但是在运行时错误来了

Exception Details: System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.

参数名称：index

第68行：昏暗行作为GridViewRow = GridView2.Rows（GridView2.EditIndex）

请帮助

Answer 1

我可以解释一下错误在说什么..

Dim row As GridViewRow = GridView2.Rows(GridView2.EditIndex)

检查GridView2.EditIndex的值。具有该索引的特定Gridview中没有行。因此，您可以检查 EditIndex 的值。

gridview selectedindexchanged错误的下拉列表

1 个答案: