C# 在代码隐藏中为网格中的复选框指定值

我在asp.net中有以下网格

<asp:GridView ID="grdDWlocations" CssClass="table table-hover table-striped" runat="server" GridLines="None" ShowHeaderWhenEmpty="True"
    EmptyDataText="No data found..." AutoGenerateColumns="False">
    <Columns>
        <asp:TemplateField HeaderText="" Visible="true">
            <HeaderTemplate>
                <asp:CheckBox ID="allDWlocchk" runat="server" Checked="true" Width="10px" onclick="CheckAllgrdReqDW(this)"></asp:CheckBox>
            </HeaderTemplate>
            <ItemTemplate>
                <asp:CheckBox ID="chk_DWlocReq" runat="server" Checked="true" Width="5px" OnCheckedChanged="chk_Req_CheckedChangedDW_Click" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Code">
            <ItemTemplate>
            <asp:Label ID="lbl_DWCode" runat="server" Text='<%# Bind("Ml_loc_cd") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Description">
            <ItemTemplate>
                <asp:Label ID="lbl_DWDescription" runat="server" Text='<%# Bind("Ml_loc_desc") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

但以上一项无效，如何才能正确执行？

使用此项：

    foreach(GridViewRow row in GridView1.Rows) {
        if(row.RowType == DataControlRowType.DataRow) {
            CheckBox myCheckBoxID = row.FindControl("myCheckBoxID") as CheckBox;
        }
        myCheckBoxID.Checked = true;
    }

或 如果您正在处理RowDataBound事件，则如下所示：

    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if(e.Row.RowType == DataControlRowType.DataRow)
        {
            CheckBox myCheckBoxID = e.Row.FindControl("myCheckBoxID") as CheckBox;
        }
        myCheckBoxID.Checked = true;
    }

使用以下命令：

    foreach(GridViewRow row in GridView1.Rows) {
        if(row.RowType == DataControlRowType.DataRow) {
            CheckBox myCheckBoxID = row.FindControl("myCheckBoxID") as CheckBox;
        }
        myCheckBoxID.Checked = true;
    }

或 如果您正在处理RowDataBound事件，则如下所示：

    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if(e.Row.RowType == DataControlRowType.DataRow)
        {
            CheckBox myCheckBoxID = e.Row.FindControl("myCheckBoxID") as CheckBox;
        }
        myCheckBoxID.Checked = true;
    }

请尝试以下操作：

CheckBox checkbox1 = dgvr.FindControl("chk_DWlocReq") as CheckBox;     
checkbox1.Checked = true;   

请尝试以下操作：

CheckBox checkbox1 = dgvr.FindControl("chk_DWlocReq") as CheckBox;     
checkbox1.Checked = true;   

---

我认为您的代码必须更改为：

foreach (GridViewRow dgvr in grdDWlocations.Rows)
{
    ((CheckBox)dgvr.FindControl("chk_DWlocReq")).Checked=true;
}

---

我认为您的代码必须更改为：

foreach (GridViewRow dgvr in grdDWlocations.Rows)
{
    ((CheckBox)dgvr.FindControl("chk_DWlocReq")).Checked=true;
}

我使用了以下代码：

ds1.SelectCommand = String.Format("exec myStoredproc");
dv1 = (DataView)ds1.Select(DataSourceSelectArguments.Empty);

    for (int i = 0; i < GridView1.Rows.Count; i++)
                {
                    if (dv1.Table.Rows[i]["ReceiveNotification"].ToString() == "1")
                    {
                        ((CheckBox)GridView1.Rows[i].FindControl("GV_chkNotification")).Checked = true;
                    }
                    else
                    {
                        ((CheckBox)GridView1.Rows[i].FindControl("GV_chkNotification")).Checked = false;
                    }
    
                }

我使用了以下代码：

ds1.SelectCommand = String.Format("exec myStoredproc");
dv1 = (DataView)ds1.Select(DataSourceSelectArguments.Empty);

    for (int i = 0; i < GridView1.Rows.Count; i++)
                {
                    if (dv1.Table.Rows[i]["ReceiveNotification"].ToString() == "1")
                    {
                        ((CheckBox)GridView1.Rows[i].FindControl("GV_chkNotification")).Checked = true;
                    }
                    else
                    {
                        ((CheckBox)GridView1.Rows[i].FindControl("GV_chkNotification")).Checked = false;
                    }
    
                }