checkbox全选

<ddHEAD runat="server">

    <ddSCRIPT language=javascript>
        function SelAllBox(obj)
        {
            var ctls=document.getElementsByTagName("INPUT");
            document.getElementById("<%=HiddenchkIDBox.ClientID%>").value="";
            for(i=0;i<ctls.length;i++)
            {
                if(ctls[i].type=="checkbox")
                {
                    ctls[i].checked=obj.checked;
                    if (ctls[i]!=obj && obj.checked==true)
                        document.getElementById("<%=HiddenchkIDBox.ClientID%>").value+=","+ctls[i].value;
                }
            }
        }

        function AddRemoveValues(oChk)
        {
            if(oChk.checked)
                document.getElementById("<%=HiddenchkIDBox.ClientID%>").value += "," + oChk.value;
            else
                document.getElementById("<%=HiddenchkIDBox.ClientID%>").value = document.getElementById("<%=HiddenchkIDBox.ClientID%>").value.replace("," + oChk.value,"");
        }

    </SCRIPT>



    <FORM id=form1 runat="server">
         <DIV style="TEXT-ALIGN: center">
            <TABLE style="WIDTH: 437px" cellSpacing=0 cellPadding=0 border=0><TBODY><TR><TD><ASP:GRIDVIEW id=GridView1 runat="server" Font-Size="12px" Width="422px" AutoGenerateColumns="False" BackColor="White" BorderColor="#6895B4" BorderStyle="Solid" BorderWidth="1px" CellPadding="3" HorizontalAlign="Center" Height="1px" PageSize="5" OnRowCommand="GridView1_RowCommand"><FOOTERSTYLE BackColor="White" BorderColor="#6895B4" BorderStyle="Solid" BorderWidth="1px" ForeColor="#000066" /><COLUMNS><ASP:TEMPLATEFIELD><ITEMTEMPLATE><INPUT id=ChkBox onclick=AddRemoveValues(this) type=checkbox value='<%#Eval("UserName") %>'><%#Eval("NUMID") %> </ITEMTEMPLATE><HEADERTEMPLATE><INPUT id=SelAllChkBox onclick=SelAllBox(this) type=checkbox>全选 </HEADERTEMPLATE><ITEMSTYLE Width="140px" HorizontalAlign="Center" /><HEADERSTYLE BorderColor="#6895B4" BorderStyle="Solid" BorderWidth="1px" /></ASP:TEMPLATEFIELD></COLUMNS><ROWSTYLE BorderColor="#6895B4" BorderStyle="Solid" BorderWidth="1px" HorizontalAlign="Center" ForeColor="#000066" /><SELECTEDROWSTYLE BackColor="#669999" ForeColor="White" Font-Bold="True" /><PAGERSTYLE BackColor="White" BorderColor="White" BorderStyle="None" BorderWidth="0px" HorizontalAlign="Right" ForeColor="#000066" /><HEADERSTYLE BackColor="#CCD7DD" BorderColor="#6895B4" BorderStyle="Solid" BorderWidth="1px" HorizontalAlign="Center" ForeColor="Black" Font-Bold="True" /><EMPTYDATAROWSTYLE BorderColor="#6895B4" BorderStyle="Solid" BorderWidth="1px" /><ALTERNATINGROWSTYLE BorderColor="#6895B4" BorderStyle="Solid" BorderWidth="1px" /></ASP:GRIDVIEW></TD></TR></TBODY></TABLE>
        </DIV>
                        <INPUT id=HiddenchkIDBox style="WIDTH: 120px" type=hidden runat="server">
    </FORM>




还有另外一种:
public void SelectedAll(bool checkstate)
        {
            HdnSelectedValues.Value = "";
            for (int i = 0; i < this.GridView1.Rows.Count; i++)
            {
                HtmlInputCheckBox ckb = (HtmlInputCheckBox)this.GridView1.Rows[i].Cells[0].FindControl("ChkSelect");
                ckb.Checked = checkstate;
                HdnSelectedValues.Value += "," + ckb.Value;
            }
        }

    
    

         
        

        
<%#eval("numid") %> 
                    
                    全选
                    
                    
                    
                    
                    
                    
                    
        
        
    
    还有另外一种:
    public void SelectedAll(bool checkstate)
    {
    HdnSelectedValues.Value = "";
    for (int i = 0; i < this.GridView1.Rows.Count; i++)
    {
    HtmlInputCheckBox ckb = (HtmlInputCheckBox)this.GridView1.Rows[i].Cells[0].FindControl("ChkSelect");
    ckb.Checked = checkstate;
    HdnSelectedValues.Value += "," + ckb.Value;
    }
    }
    

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