1

我在模板字段中有一个带有文本框的 gridView。如果在行中标记了复选框，我想提取文本框的文本。

我将gridView定义如下

    <asp:GridView ID="GV_Comments" runat="server" AutoGenerateColumns="False" DataKeyNames="id"
        DataSourceID="SQL_Comments">
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:CheckBox runat="server" ID="Comment_Select" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField DataField="ID" HeaderText="ID" ReadOnly="True" SortExpression="ID" />
            <asp:TemplateField HeaderText="comment" SortExpression="comment">
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Bind("comment") %>'></asp:Label>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="CommentForPeriod" runat="server" Text='<%# Bind("comment") %>'></asp:TextBox>
                </EditItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView> 
    <asp:Button ID="B_Load" runat="server" Text="Transfer Selection" onclick="B_Load_Click" />
    <br />
    <asp:TextBox ID="CompiledText" runat="server" Width="662px" Rows="10" 
        TextMode="MultiLine"></asp:TextBox>

并且代码如下

Protected Sub B_Load_Click(ByVal sender As Object, ByVal e As EventArgs) '(sender As Object, e As System.EventArgs) Handles B_Load.Click
    Dim FullText As String = ""
    For Each row As GridViewRow In GV_Comments.Rows
        Dim CB_Control As CheckBox = CType(row.FindControl("Comment_Select"), CheckBox)
        Dim Txt_Control As TextBox = CType(row.FindControl("CommentForPeriod"), TextBox)
        If CB_Control IsNot Nothing AndAlso CB_Control.Checked AndAlso Txt_Control IsNot Nothing Then
            FullText = FullText & Txt_Control.Text & "<br/>"
        End If
    Next row
    CompiledText.Text = FullText.ToString
End Sub

当我调试代码时，我可以看到找到了 Checkbox 控件，但没有找到 TextBox 控件。有人会明白为什么吗？

4

1 回答 1

5

你不能这样。当您单击按钮时：B_Load，然后 GridView 不处于编辑模式。这就是为什么你不能得到TextBox, 在EditItemTemplate.

<ItemTemplate> 由于gridview处于正常显示模式，您只能在按钮单击中获取控件。<EditItemTemplate>控件仅在 GridView 进入Editmode时呈现。

所以，你需要得到 Label: Label1here 实际上的值，它具有相同的值并且在 inside <ItemTemplate>。

 Dim Lbl_Control As Label= CType(row.FindControl("Label1"), Label)

// 像往常一样单击按钮，只是获取并检查 Label 控件的值，而不是 TextBox 控件。

Protected Sub B_Load_Click(ByVal sender As Object, ByVal e As EventArgs) '(sender As
                           Object, e As System.EventArgs) Handles B_Load.Click
    Dim FullText As String = ""
    For Each row As GridViewRow In GV_Comments.Rows
        Dim CB_Control As CheckBox = CType(row.FindControl("Comment_Select"), 
                                           CheckBox)
        Dim Lbl_Control As Label= CType(row.FindControl("Label1"), Label)
        If CB_Control IsNot Nothing AndAlso CB_Control.Checked AndAlso Lbl_Control
           IsNot Nothing Then
            FullText = FullText &  Lbl_Control.Text & "<br/>"
        End If
    Next row
    CompiledText.Text = FullText.ToString
End Sub
于 2013-10-03T12:04:29.953 回答