C# 当复选框OnCheckedChange时，如何从gridview获取复选框值

我想在签入gridview时更新数据。在我应该从复选框中获取值之前，但我的代码只从数据库返回数据。检查后，我需要当前值

代码隐藏：-

protected void chkSelected_CheckedChanged(object sender, EventArgs e)
{
    for (int rowIndex = 0; rowIndex < GridView1.Rows.Count; rowIndex++)
    {
        if (Convert.ToString(GridView1.Rows[rowIndex].Cells[4].Text) != "")
        {
            Response.Write("true");
        }
        else
        {
            Response.Write("fasle");
        }
    }
}

<asp:GridView ID="GridView1" runat="server" DataSourceID="SqlDataSource1"
              CellPadding="4" GridLines="None" ForeColor="#333333" Font-Size="Smaller" 
              AutoGenerateColumns="False">
    <RowStyle BackColor="#EFF3FB" />
    <Columns>
        <asp:BoundField DataField="LevelID" HeaderText="ลำดับข้อ" ReadOnly="True" 
                        ItemStyle-Width="50"  >
        </asp:BoundField>
        <asp:BoundField DataField="LevelDesc" HeaderText="คำถาม" ReadOnly="True" 
                        ItemStyle-Width="250"  >
        </asp:BoundField>
        <asp:BoundField DataField="ChoiceID" HeaderText="ข้อย่อย" ReadOnly="True" 
                        ItemStyle-Width="50"  >
        </asp:BoundField>
        <asp:BoundField DataField="ChoiceDesc" HeaderText="คำถามย่อย" ReadOnly="True" 
                        ItemStyle-Width="400"  >
        </asp:BoundField>
        <asp:TemplateField HeaderText="ใช่">          
            <ItemTemplate>              
                <asp:CheckBox ID="chkSelected" runat="server" Checked='<%# Eval("Selected").ToString().Equals("True") %>'
                     AutoPostBack="true" OnCheckedChanged="chkSelected_CheckedChanged" CssClass="chkBox" />          
            </ItemTemplate>       
        </asp:TemplateField> 
    </Columns>
    <FooterStyle BackColor="#507CD1" ForeColor="White" Font-Bold="True" />
    <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
    <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
    <HeaderStyle BackColor="#0000CD" Font-Bold="True" ForeColor="White" />
    <EditRowStyle BackColor="#2461BF" />
    <AlternatingRowStyle BackColor="White" />
</asp:GridView>

protectedvoid chkSelected\u CheckedChanged（对象发送方，事件参数e）
{
对于（int-rowIndex=0；rowIndex

设计代码：-

protected void chkSelected_CheckedChanged(object sender, EventArgs e)
{
    for (int rowIndex = 0; rowIndex < GridView1.Rows.Count; rowIndex++)
    {
        if (Convert.ToString(GridView1.Rows[rowIndex].Cells[4].Text) != "")
        {
            Response.Write("true");
        }
        else
        {
            Response.Write("fasle");
        }
    }
}

<asp:GridView ID="GridView1" runat="server" DataSourceID="SqlDataSource1"
              CellPadding="4" GridLines="None" ForeColor="#333333" Font-Size="Smaller" 
              AutoGenerateColumns="False">
    <RowStyle BackColor="#EFF3FB" />
    <Columns>
        <asp:BoundField DataField="LevelID" HeaderText="ลำดับข้อ" ReadOnly="True" 
                        ItemStyle-Width="50"  >
        </asp:BoundField>
        <asp:BoundField DataField="LevelDesc" HeaderText="คำถาม" ReadOnly="True" 
                        ItemStyle-Width="250"  >
        </asp:BoundField>
        <asp:BoundField DataField="ChoiceID" HeaderText="ข้อย่อย" ReadOnly="True" 
                        ItemStyle-Width="50"  >
        </asp:BoundField>
        <asp:BoundField DataField="ChoiceDesc" HeaderText="คำถามย่อย" ReadOnly="True" 
                        ItemStyle-Width="400"  >
        </asp:BoundField>
        <asp:TemplateField HeaderText="ใช่">          
            <ItemTemplate>              
                <asp:CheckBox ID="chkSelected" runat="server" Checked='<%# Eval("Selected").ToString().Equals("True") %>'
                     AutoPostBack="true" OnCheckedChanged="chkSelected_CheckedChanged" CssClass="chkBox" />          
            </ItemTemplate>       
        </asp:TemplateField> 
    </Columns>
    <FooterStyle BackColor="#507CD1" ForeColor="White" Font-Bold="True" />
    <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
    <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
    <HeaderStyle BackColor="#0000CD" Font-Bold="True" ForeColor="White" />
    <EditRowStyle BackColor="#2461BF" />
    <AlternatingRowStyle BackColor="White" />
</asp:GridView>

---

使用

GridViewRow

如下…您可以获得复选框的当前行，该复选框使用

NamingContainer

属性进行检查，如下所示

<asp:TemplateField HeaderText="ใช่">          
            <ItemTemplate>              
                <asp:CheckBox ID="chkSelected" runat="server"  Checked='<%# Eval("Selected").ToString().Equals("True") %>'
                     AutoPostBack="true" OnCheckedChanged="chkSelected_CheckedChanged" CssClass="chkBox" />     
                <asp:HiddenField ID="hiddenField1" Value='<%# Eval("Selected").ToString() %>' runat="server" />    
            </ItemTemplate>       
 </asp:TemplateField> 

编辑：- 更改标记并添加Hiddenfield以保留选定项的值，如下所示

<asp:TemplateField HeaderText="ใช่">          
            <ItemTemplate>              
                <asp:CheckBox ID="chkSelected" runat="server"  Checked='<%# Eval("Selected").ToString().Equals("True") %>'
                     AutoPostBack="true" OnCheckedChanged="chkSelected_CheckedChanged" CssClass="chkBox" />     
                <asp:HiddenField ID="hiddenField1" Value='<%# Eval("Selected").ToString() %>' runat="server" />    
            </ItemTemplate>       
 </asp:TemplateField> 

---

你的代码成功了！但如果我选中数据库中的数据为“True”，则返回“false”；如果我选中数据库中的数据为“Null”，则返回“false”。通过查看代码，您已将“Selected”值绑定到复选框，当gridview呈现时，将显示哪些内容…单击该复选框，您到底想要实现什么？我想要复选框的当前状态。当我选中复选框时，若数据库中的数据为true，则返回值为false。我尝试了它，但它仅在我选中复选框时返回数据库中的数据。如果数据库中的数据在我选中时为false，则始终返回false；如果数据库中的数据在我选中时也为true，则始终返回retrun true。是否希望在选中复选框时，无论数据库中有什么值，它都应返回true，反之亦然？