ASPxGridView.Selection 总是 = 0 并且 ASPxGridView.GetSelectedFieldValues 不起作用

Question

只是我试图从 devexpress gridview 中获取选定的行，但它对我来说从来没有用过，我尝试过客户端和自定义回调，并尝试过服务器端，但它没有用，花了 10 个小时搜索并尝试了每一个我得到了解决方案，但对我没有任何效果，有人可以给我一个提示，我缺少什么吗？，这是代码：

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);
        }
    }

提前谢谢...

更新： 当我使用“asp:SqlDataSource”时它工作正常。

Answer 1

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