Question

是否有任何方法可以在gridview取消编辑事件中找到控制隐藏字段。我已经尝试了一些方法，但是没有用

protected void InnerGrid_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
 {
     InnerGrid.EditIndex = -1;
     HiddenField hdCaID = InnerGrid.Rows[e.RowIndex].FindControl("hdCaID") as HiddenField;
 }

这是我的代码，但我找不到隐藏字段，我得到null异常错误。感谢任何帮助..

Answer 1

您需要指定您尝试查找隐藏字段的Cell：

int i = e.RowIndex;
HiddenField hdCaID = InnerGrid.Rows[i].Cells[1].FindControl("hdCaID") as HiddenField;

以下是一个完整的示例，代码背后：

public partial class GridViewCancel : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!Page.IsPostBack)
        {
            BindData();
        }
    }

    public void BindData()
    {
        var c1 = new Customer { HiddenID = 11, FirstName = "Name1", LastName = "Surname1" };
        var c2 = new Customer { HiddenID = 22, FirstName = "Name2", LastName = "Surname2" };
        var c3 = new Customer { HiddenID = 33, FirstName = "Name3", LastName = "Surname3" };

        InnerGrid.DataSource = new List<Customer> { c1, c2, c3 };
        InnerGrid.DataBind();
    }

    protected void InnerGrid_RowEditing(object sender, GridViewEditEventArgs e)
    {
        InnerGrid.EditIndex = e.NewEditIndex;
        BindData();
    }

    protected void InnerGrid_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        int i = e.RowIndex;
        HiddenField hdCaID = InnerGrid.Rows[i].Cells[1].FindControl("hdCaID") as HiddenField;
        if (hdCaID != null)
        {
            string value = hdCaID.Value;
        }

        InnerGrid.EditIndex = -1;
        BindData();
    }
}

<强> .ASPX：

<asp:GridView ID="InnerGrid" runat="server" AutoGenerateEditButton="True" AutoGenerateColumns="false" OnRowCancelingEdit="InnerGrid_RowCancelingEdit" OnRowEditing="InnerGrid_RowEditing">
    <Columns>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:HiddenField ID="hdCaID" runat="server" Value='<%# Eval("HiddenID") %>' />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="FirstName" />
        <asp:BoundField DataField="LastName" />
    </Columns>
</asp:GridView>

FindControl内部Gridview CancelEdit事件

1 个答案: