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使用 javascript 計算 gridview 字段總數並顯示在頁腳文本框中

[英]Calculating gridview field total and displaying in footer text box using javascript

我正在努力找出 gridview 單元格的總數並顯示值頁腳文本框。 每次我遇到異常時:請幫助我做錯了什么:

這是例外: Microsoft JScript 運行時錯誤:預期 Object *這是我的 gridview 代碼: *

 <div>
 <asp:gridview ID="Gridview1" runat="server" ShowFooter="true" 
        onrowcommand="Gridview1_RowCommand"  AutoGenerateColumns="false" 
        CellSpacing="0" CellPadding="0" Font-Bold="false" 
        onrowdeleting="Gridview1_RowDeleting">
    <Columns>
  <asp:BoundField DataField="RowNumber" HeaderText="Row Number"/>
  <asp:TemplateField HeaderText="Select" ControlStyle-Width="50px" HeaderStyle-Font-Bold="false" ControlStyle-Font-Bold="false">
 <ItemTemplate>
     <asp:CheckBox ID="chkSelect" runat="server" Width="80px"/>
 </ItemTemplate>     
 </asp:TemplateField>
    <asp:TemplateField HeaderText="Header 1" HeaderStyle-Font-Bold="false"  ControlStyle-Font-Bold="false">
        <ItemTemplate>
            <asp:TextBox ID="TextBox1" runat="server" Width="70px"></asp:TextBox>
        </ItemTemplate>            
        <FooterTemplate>
            <asp:Label ID="lblTotal" runat="server" Text="Total" Font-Bold="true">       </asp:Label>
        </FooterTemplate>            
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Header 2"  HeaderStyle-Font-Bold="false" ControlStyle-Font-Bold="false">
        <ItemTemplate>
            <asp:TextBox ID="TextBox2" Width="70px" runat="server" onkeyup="Calculate('Gridview1')"></asp:TextBox>
        </ItemTemplate>            
        <FooterTemplate>
            <asp:TextBox ID="total" runat="server" Width="70px"></asp:TextBox>
        </FooterTemplate>            
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Header 3" HeaderStyle-Font-Bold="false" ControlStyle-Font-Bold="false">
        <ItemTemplate>
             <asp:TextBox ID="TextBox3" Width="70px" runat="server" ></asp:TextBox>
        </ItemTemplate>
        <FooterStyle HorizontalAlign="Right" />
        <FooterTemplate>
         <asp:Button ID="ButtonAdd" runat="server" Text="Add New Row" CommandName="AddNewRow" />
        </FooterTemplate>
    </asp:TemplateField>
    </Columns>
  </asp:gridview>   
  </div>

這是我的 JavaScript 代碼:

   <script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.5.js"></script>  
<script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.10/jquery-ui.js"></script> 
<script type="text/javascript">  
function Calculate(GridView)
{
   var total = 0;   
   var gridview = document.getElementById('<%=Gridview1.ClientID %>').getElementsByTagName("input");        
   for ( i = 0; i < gridview.rows.length; i ++)
   {
       var node = gridview.rows[i].cells[3].childNodes[3]; //textbox  

       if (node != undefined && node.type == "text") //check only textbox, ignore empty one
            if (!isNaN(node.value) && node.value != "") //check for valid number
               total += parseInt(node.value); 
   }       
  // document.getElementById("total").innerHTML = total.toString(); //display
   var gridview1 = document.getElementById('<%=grdview1.ClientID %>');
   gridview1.rows[gridview.rows.length -1].cells[0].innerHTML=total;

}

我嘗試了很多方法,但每次都遇到相同的異常:Microsoft JScript runtime error: Object expected

我的 JavaScript 代碼似乎有問題..請有人幫幫我。

Your function doesn't need to take in an object since you are not using it in your javascript, the way you are passing the GridView I don't believe would work anyway.

我認為,如果您利用一些 jQuery 選擇器在 DOM 中查找您需要的元素,我認為您的 javascript 會更干凈,也更容易遵循。 您可以對要總計的文本框使用特殊的 class ,例如:

....
<asp:TemplateField HeaderText="Header 1" HeaderStyle-Font-Bold="false"  ControlStyle-Font-Bold="false">
    <ItemTemplate>
        <asp:TextBox ID="TextBox1" Class="TotalBox" runat="server" Width="70px"></asp:TextBox>
    </ItemTemplate>            
    <FooterTemplate>
        <asp:Label ID="lblTotal" Class="TotalLabel" runat="server" Text="Total" Font-Bold="true">       </asp:Label>
    </FooterTemplate>            
</asp:TemplateField>
....

Java腳本

<script type="text/javascript">
function Calcutate()
{
     var total = 0;
     $('.TotalBox').each(function() {
         total = parseInt(this.val()) + total;
     });

     $('.TotalLabel').html(total);
}
</script>

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