aspxgrid取模板列(checkbox)示例

CS source

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections;
using System.Collections.Generic;
using DevExpress.Web;
using DevExpress.Web.ASPxDataControls;
using DevExpress.Web.ASPxGrid;

public partial class _Default: System.Web.UI.Page {

    //Data Variables.
    protected DataSet DataSet1 = new DataSet();
    protected DataTable DataTable1 = new DataTable();
    protected DataColumn DataColumn1 = new DataColumn();
    protected DataColumn DataColumn2 = new DataColumn();

    public List<string> SelectedRows {
        get {
            List<string> _selectedRows = Session["SelectedRows"] as List<string>;

            if (_selectedRows == null) {
                _selectedRows = new List<string>();
                Session["SelectedRows"] = _selectedRows;
            }
            return _selectedRows;
        }
    }
    protected void Page_Init(object sender, EventArgs e) {
        //Initialize datasets
        DataSet1.DataSetName = "NewDataSet";
        DataSet1.Locale = new System.Globalization.CultureInfo("en-US");
        DataSet1.Tables.AddRange(new DataTable[] { DataTable1 });

        DataTable1.Columns.AddRange(new DataColumn[] { DataColumn1, DataColumn2 });
        DataTable1.TableName = "Table1";

        DataColumn1.ColumnName = "ID";
        DataColumn1.DataType = typeof(int);

        DataColumn2.ColumnName = "Name";

        DataSet1.EndInit();
        DataTable1.EndInit();
    }

    protected void Page_Load(object sender, EventArgs e) {
        ASPxGrid1.DataSource = DataSet1;
        ASPxGrid1.DataKeyField = "ID";

        DataBind();
    }

    protected override void RaisePostBackEvent(IPostBackEventHandler sourceControl, string eventArgument) {
        // the onclick="event.cancelBubble=true;" attribute is added to the template checkbox to
        // prevent enter to edit mode on checkbox click
        foreach (ASPxGridItem item in ASPxGrid1.Items) {
            if (item.ItemType == ItemType.Item || item.ItemType == ItemType.AlternatingItem) {
                bool checkedState;
                CheckBox currentCheckbox = item.FindControl("CheckBox1") as CheckBox;

                checkedState = currentCheckbox.Checked;

                if (checkedState) {
                    if (!IsRowSelected(item.Row.KeyValue.ToString()))
                        SelectedRows.Add(item.Row.KeyValue.ToString());
                }
                else
                    SelectedRows.Remove(item.Row.KeyValue.ToString());
            }
        }
        base.RaisePostBackEvent(sourceControl, eventArgument);
    }

    protected void ASPxGrid1_FetchingRows(object sender, EventArgs e) {
        // this line need if the ASPxGrid1.DataBind(Rebind.Yes) is called
        if (DataTable1.Rows.Count == 0) {
            for (int i = 0; i < 10; i++) {
                DataTable1.Rows.Add(i, "Item " + i.ToString());
            }
        }
    }

    public bool IsRowSelected(string keyValue) {
        return SelectedRows.IndexOf(keyValue) > -1;
    }
    protected void Button1_Click(object sender, EventArgs e) {
        SelectedRows.Clear();
        foreach (DataRow row in DataTable1.Rows) {
            if (!IsRowSelected(row[0].ToString()))
                SelectedRows.Add(row[0].ToString());
        }

        ASPxGrid1.DataBind(Rebind.Yes); // in VS2005 the DataBind(true) has different meaning (see the documentation)
    }
    protected void Button2_Click(object sender, EventArgs e) {
        ListBox1.Items.Clear();
        foreach (string key in SelectedRows) {
            ListBox1.Items.Add(key);
        }
    }
    protected void ASPxGrid1_ItemDataBound(object sender, ItemEventArgs e) {
        if (e.Item.ItemType == ItemType.Item || e.Item.ItemType == ItemType.AlternatingItem) {
            CheckBox currentCheckbox = e.Item.FindControl("CheckBox1") as CheckBox;
            currentCheckbox.Checked = IsRowSelected(e.Item.Row.KeyValue.ToString());
        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {

    }
}

html source

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<%@ Register Assembly="DevExpress.Web.ASPxGrid.v7.1, Version=7.1.1.0, Culture=neutral, PublicKeyToken=79868b8147b5eae4"
 Namespace="DevExpress.Web.ASPxGrid" TagPrefix="dxwg" %>
<%@ Register Assembly="DevExpress.Web.ASPxDataControls.v7.1, Version=7.1.1.0, Culture=neutral, PublicKeyToken=79868b8147b5eae4"
 Namespace="DevExpress.Web.ASPxDataControls" TagPrefix="dxwdc" %>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
   <dxwg:ASPxGrid ID="ASPxGrid1" runat="server" OnFetchingRows="ASPxGrid1_FetchingRows" AutoGenerateColumns="False" TabIndex="0" OnItemDataBound="ASPxGrid1_ItemDataBound" ProcessingMode="Server">
    <FooterStyle FixedHeight="True" FixedWidth="True" />
    <StatusBars>
     <dxwg:StatusBar Height="20px" StatusBarType="Regular">
      <BarItems>
       <dxwdc:BarStatusSection StatusSectionType="Status">
       </dxwdc:BarStatusSection>
       <dxwdc:BarStatusSection StatusSectionType="VisibleInterval">
       </dxwdc:BarStatusSection>
       <dxwdc:BarStatusSection StatusSectionType="TotalVisible">
       </dxwdc:BarStatusSection>
       <dxwdc:BarStatusSection StatusSectionType="TotalRows">
       </dxwdc:BarStatusSection>
      </BarItems>
     </dxwg:StatusBar>
    </StatusBars>
    <GroupItemStyle FixedWidth="True" Wrap="False">
    </GroupItemStyle>
    <HeaderStyle FixedHeight="True" FixedWidth="True" Wrap="False" />
    <ButtonBars>
     <dxwg:ButtonBar ButtonBarType="Navigator">
      <BarItems>
       <dxwdc:BarButton ButtonType="MoveFirst">
       </dxwdc:BarButton>
       <dxwdc:BarButton ButtonType="MovePrevPage">
       </dxwdc:BarButton>
       <dxwdc:BarButton ButtonType="MovePrev">
       </dxwdc:BarButton>
       <dxwdc:BarTwoStateEditorButton ButtonType="ChangePageSize">
       </dxwdc:BarTwoStateEditorButton>
       <dxwdc:BarButton ButtonType="MoveNext">
       </dxwdc:BarButton>
       <dxwdc:BarButton ButtonType="MoveNextPage">
       </dxwdc:BarButton>
       <dxwdc:BarButton ButtonType="MoveLast">
       </dxwdc:BarButton>
       <dxwdc:BarButton ButtonType="InsertRow">
       </dxwdc:BarButton>
       <dxwdc:BarButton ButtonType="EditRow">
       </dxwdc:BarButton>
       <dxwdc:BarButton ButtonType="DeleteRow">
       </dxwdc:BarButton>
       <dxwdc:BarButton ButtonType="Refresh">
       </dxwdc:BarButton>
       <dxwdc:BarEditModeButton ButtonType="Post">
       </dxwdc:BarEditModeButton>
       <dxwdc:BarEditModeButton ButtonType="Cancel">
       </dxwdc:BarEditModeButton>
      </BarItems>
     </dxwg:ButtonBar>
    </ButtonBars>
    <SearchBtnStyle FixedWidth="True">
    </SearchBtnStyle>
    <Columns>
     <dxwg:BoundColumn DataField="ID" HeaderText="ID" VisibleIndex="0">
     </dxwg:BoundColumn>
     <dxwg:BoundColumn DataField="Name" HeaderText="Name" VisibleIndex="1">
     </dxwg:BoundColumn>
     <dxwg:TemplateColumn HeaderText="Selection" VisibleIndex="2">
      <ItemTemplate>
       <asp:CheckBox ID="CheckBox1" runat="server" onclick="event.cancelBubble=true;" />
      </ItemTemplate>
     </dxwg:TemplateColumn>
    </Columns>
    <ItemStyle FixedWidth="True" Wrap="False" />
   </dxwg:ASPxGrid>
   <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Select All" />
   
    </div>
   <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="GetSelected" /><br />
   <asp:ListBox ID="ListBox1" runat="server" Height="168px" Width="264px"></asp:ListBox>
    </form>
</body>
</html>