datagrid 中checkbox控制的问题

承接前一问题http://community.csdn.net/Expert/topic/5652/5652860.xml?temp=.2189752
datagrid中最后一列是checkbox
　　　　　　　　　　　　　　　　　buttonA（datagrid之外）
--------------------------------------------
A1:Taiwan
------------------------------------
product_CD0,item_CD,product_name,....□
--------------------------------------------
A2:Hongkong
------------------------------------
product_CD1,item_CD,product_name,....□
product_CD2,item_CD,product_name,....□
product_CD3,item_CD,product_name,....□--------------------------------------------
A3:China
------------------------------------
product_CD5,item_CD,product_name,....□
--------------------------------------------1，每个区域中只能有一个checkbox可以使用
2，datagrid中有checkbox被选中的时候，buttonA可用
一个都没有的时候，buttonA不可用

解决方案 »

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so easy， just waiting
just try<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %><%--
http://community.csdn.net/Expert/TopicView3.asp?id=5652860
--%><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server">

    private int lastCategoryId = -1; // 私有字段，当前绑定 DataGrid 行的上一行的 CategoryId

    void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack) {
            LoadProductData();
        }
    }    protected void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e)
    {
        DataRowView drv = e.Item.DataItem as DataRowView;
        if (drv != null) {
            int currentCategoryId = (int)drv["CategoryID"];
            // 比较当前行与上一行的 CategoryId
            if (lastCategoryId != currentCategoryId) {
                //
                DataGridItem itemCategory = new DataGridItem(-1, -1, ListItemType.Item);
                TableCell emptyCell = new TableCell();
                emptyCell.Text = GetCategoryName(currentCategoryId);
                emptyCell.ColumnSpan = DataGrid1.Columns.Count; // 合并列
                itemCategory.Cells.Add(emptyCell);
                // 在当前行之前插入一行
                DataGrid1.Controls[0].Controls.AddAt(DataGrid1.Controls[0].Controls.Count - 1, itemCategory);
                //
                lastCategoryId = currentCategoryId;
            }
        }
    }    string GetCategoryName(int categoryId)
    {
        switch (categoryId) {
            case 1 :
                return "A1:Taiwan";
            case 2:
                return "A2:Hongkong";
            case 3:
                return "A3:RPC";
            default:
                return "unknown";
        }
    }

    void LoadProductData()
    {
        DataTable dt = CreateProductTable();
        DataView dv = dt.DefaultView;
        dv.Sort = "CategoryID, ProductID";
        DataGrid1.DataSource = dv;
        DataGrid1.DataBind();
    }      #region sample data       static DataTable CreateProductTable()
    {
        DataTable tbl = new DataTable("Products");        tbl.Columns.Add("ProductID", typeof(int));
        tbl.Columns.Add("ProductName", typeof(string));
        tbl.Columns.Add("CategoryID", typeof(int));
        tbl.Columns.Add("HasPic", typeof(bool));
        tbl.Columns.Add("Reviewed", typeof(bool));
        DataRow row = tbl.NewRow();
        row[0] = 1;
        row[1] = "Chai";
        row[2] = 1;
        row[3] = true;
        row[4] = false;
        tbl.Rows.Add(row);        row = tbl.NewRow();
        row[0] = 2;
        row[1] = "Chang";
        row[2] = 1;
        row[3] = false;
        row[4] = false;
        tbl.Rows.Add(row);        row = tbl.NewRow();
        row[0] = 3;
        row[1] = "Aniseed Syrup";
        row[2] = 2;
        row[3] = true;
        row[4] = false;
        tbl.Rows.Add(row);        row = tbl.NewRow();
        row[0] = 4;
        row[1] = "Chef Anton's Cajun Seasoning";
        row[2] = 2;
        row[3] = false;
        row[4] = true;
        tbl.Rows.Add(row);        row = tbl.NewRow();
        row[0] = 5;
        row[1] = "Chef Anton's Gumbo Mix";
        row[2] = 2;
        row[3] = true;
        row[4] = true;
        tbl.Rows.Add(row);        row = tbl.NewRow();
        row[0] = 47;
        row[1] = "Zaanse koeken";
        row[2] = 3;
        row[3] = true;
        row[4] = true;
        tbl.Rows.Add(row);        row = tbl.NewRow();
        row[0] = 48;
        row[1] = "Chocolade";
        row[2] = 3;
        row[3] = false;
        row[4] = false;
        tbl.Rows.Add(row);        row = tbl.NewRow();
        row[0] = 49;
        row[1] = "Maxilaku";
        row[2] = 3;
        row[3] = true;
        row[4] = false;
        tbl.Rows.Add(row);       return tbl;
    }

    #endregion</script><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>CSDN_DataGridMainHeaderRow</title>
    <script type="text/javascript">
    function chkItem_Click(sender, categoryId)
    {
        //debugger;
        //if(!sender.checked) return;
        var chkState = sender.checked;
        var grd = document.getElementById('<% =DataGrid1.ClientID %>');
        var chkList = document.getElementsByTagName("input");
        var chk;
        var canSubmit = chkState;
        for(var i = 0; i < chkList.length; i++){
            chk = chkList[i];
            if(chk.type == "checkbox" && chk.id.indexOf("chkItem") >= 0) {
                if(chkState && chk.parentNode.categoryId == categoryId.toString()) {
                    chk.checked = false;
                }
                if(chk.checked) canSubmit = true;
            }
        }
        sender.checked = chkState;
        document.getElementById('<% =Button1.ClientID %>').disabled = !canSubmit;
    }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <asp:Button ID="Button1" runat="server" Enabled="false" Text="Sumbit" />
    <asp:DataGrid ID="DataGrid1" runat="server" AutoGenerateColumns="false" DataKeyField="ProductID" OnItemDataBound="DataGrid1_ItemDataBound">
    <Columns>
        <asp:BoundColumn DataField="ProductID" HeaderText="ProductID"></asp:BoundColumn>
        <asp:BoundColumn DataField="ProductName" HeaderText="ProductName" ></asp:BoundColumn>
        <asp:BoundColumn DataField="CategoryID"  HeaderText="CategoryID" ></asp:BoundColumn>
        <asp:TemplateColumn>
            <ItemTemplate>
                <asp:CheckBox ID="chkItem" onclick='<%# String.Format("chkItem_Click(this, {0})", Eval("CategoryID")) %>' categoryId='<%# Eval("CategoryID") %>' runat="server" />

            </ItemTemplate>
        </asp:TemplateColumn>
    </Columns>
    </asp:DataGrid>
    </div>
    </form>
</body>
</html>
给段参考代码DataGridItem的时候给它添加事件代码如下:private void grdServer_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) {    if(e.Item.ItemType == ListItemType.Header){       CheckBox chk = (CheckBox)e.Item.FindControl("chkAllServer");       // 给页眉上的CheckBox添加出发事件chk.CheckedChanged +=new EventHandler(chk_CheckedChanged); }}事件处理程序如下所示:// 得到指定DataGrid的题头的CheckBox对象private CheckBox GetHeaderCheckBox(DataGrid grd){ CheckBox chk = null;    foreach (DataGridItem i in grd.Controls[0].Controls){        if(i.ItemType == ListItemType.Header){           chk = (CheckBox)i.FindControl("chkAllServer");           break;       }    }    return chk;} private void chk_CheckedChanged(object sender, System.EventArgs e) {    CheckBox chk = this.GetHeaderCheckBox(this.grdServer);    foreach (DataGridItem i in this.grdServer.Items){       CheckBox inChk = (CheckBox)i.FindControl("chkDelServer");           inChk.Checked = chk.Checked;    }}
要是代码可以跑起来的话，多分点给高歌哈 thx
简单的说就是ItemDataBound中根据条件控制控件属性
to Jinglecat:
------------------------------------
        <asp:TemplateColumn>
            <ItemTemplate>
                <asp:CheckBox ID="chkItem" onclick='<%# String.Format("chkItem_Click(this, {0})", Eval("CategoryID")) %>' categoryId='<%# Eval("CategoryID") %>' runat="server" />

            </ItemTemplate>
        </asp:TemplateColumn>
-------------------------------------
categoryId='<%# Eval("CategoryID") 有错误
to xocom(福大) ：
chk.CheckedChanged +=new EventHandler(chk_CheckedChanged); }}
chx 没有CheckedChanged 属性（方法）
categoryId='<%# Eval("CategoryID") 有错误＝＝＝＝＝＝＝＝＝＝＝什么错误？我是本地测试通过的啊,看看是不是贴错了，完整是 categoryId='<%# Eval("CategoryID") %>' 啊事实上由于 CheckBox 不支持　value 属性，所以这里我采取了点技巧，呵呵
categoryId='<%# Eval("CategoryID") 有错误，你看看你的vs，是不是2003的？？
categoryId='<%# Eval("CategoryID") %>'》》要是 1.x 这个绑定语法 LZ 应该会自己修改过来的撒categoryId='<%# DataBinder.Eval(Container.DataItem, "CategoryID") %>'
to Jinglecat:
谢谢你的回复！
我用的是.net2003 ,datagrid 中的checkbox 有value属性，我再研究研究。
小项目，一个人coding，遇到问题也没人指导，只能到csdn上找大家帮忙了。
thanks a lot !
datagrid 中的checkbox 有value属性＝＝＝＝＝＝＝不会哦，记得 1.x 中 asp:checkbox 不支持此属性的，我自己还些写了个 XCheckBox 来支持 value带Value属性的扩展CheckBox控件
http://www.cnblogs.com/Jinglecat/archive/2006/08/31/491221.html