ASPxGridView1.Selection总是=0，ASPxGridView1.GetSelectedFieldValues无效

Question

简单地说，我试图从devexpress网格视图中选择行，但它对我从来都不起作用，我尝试了客户端和自定义回调，也尝试了服务器端，但它不起作用，花了10个小时搜索并尝试了我得到的每个解决方案，但都没有对我起作用，有人能给我一个提示吗，我遗漏了什么?以下是代码：

default.aspx：

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
<script type="text/javascript">
    </script>
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <div>

        <dx:ASPxGridView ID="ASPxGridView1" ClientInstanceName="ASPxGridView1"  KeyFieldName="ID" AutoGenerateColumns="False" runat="server">
            <Columns>
                <dx:GridViewCommandColumn ShowSelectCheckbox="True" VisibleIndex="0" 
                    Caption="Select" Name="Select">
                </dx:GridViewCommandColumn>
                <dx:GridViewDataTextColumn Caption="ID" FieldName="pag_id_pk" Name="ID" 
                    VisibleIndex="1">
                </dx:GridViewDataTextColumn>
                <dx:GridViewDataTextColumn Caption="Name" FieldName="pag_name" Name="Name" 
                    VisibleIndex="2">
                </dx:GridViewDataTextColumn>
                <dx:GridViewDataTextColumn Caption="Title" FieldName="pag_title" Name="Title" 
                    VisibleIndex="3">
                </dx:GridViewDataTextColumn>
            </Columns>
        </dx:ASPxGridView>
        <dx:ASPxButton ID="ASPxButton1" runat="server" AutoPostBack="False" Text="Get Values" UseSubmitBehavior="False" onclick="ASPxButton1_Click" />
    </div>
</asp:Content>

default.cs：

public partial class _Default : System.Web.UI.Page
{
    DataTable table = null;
    protected void Page_Init(object sender, EventArgs e)
    {
        if (!IsPostBack && !IsCallback)
        {
            string connectionString = ...
            con.Open();
            SqlDataReader rd;
            SqlCommand cmd = new SqlCommand("SELECT * FROM [Pages]", con);
            rd = cmd.ExecuteReader();

            DataTable dt = new DataTable();
            dt.Load(rd);

            ASPxGridView1.DataSource = dt;

            Session["dt"] = (DataTable)dt;
            ASPxGridView1.DataBind();
            rd.Close();
            con.Close();
        }
    }
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void ASPxButton1_Click(object sender, EventArgs e)
    {
        List<object> indexes = new List<object>();
        for (int i = 0; i < ASPxGridView1.VisibleRowCount; i++)
        {
            if (ASPxGridView1.Selection.IsRowSelected(i))
            {
                indexes.Add(ASPxGridView1.GetRowValues(i, ASPxGridView1.KeyFieldName));
            }
        }

        foreach (var selectedKey in ASPxGridView1.GetSelectedFieldValues(ASPxGridView1.KeyFieldName))
        {
            if (!indexes.Contains(selectedKey))
                ASPxGridView1.Selection.UnselectRowByKey(selectedKey);
        }
    }

先谢谢你...

更新:当我使用"asp:SqlDataSource“时，它工作得很好。

Answer 1

您是否尝试过在回发/回调期间执行数据绑定？我认为您的网格不知道它在您的按钮单击事件中有哪些行。