如何把客户端数据传到服务器端

各位大虾帮帮忙
通过js 给 table 添加了动态行，填写内容的时候，动态改变了lable的值，但提交的时候在后台找不到添加的动态行，lable的值也还是原来的值，这个怎么解决
<table id = "table_perform" runat ="server" class="table" width ="100%" visible ="false" >
    <tr>
        <td class ="td0">
            <textarea id = "performArea_0" name = "performArea_0" runat ="server" cols ="40" rows ="2"></textarea>
        </td>
        <td class ="td1">
            <input type ="text" id ="performWeight_0" name = "performWeight_0" runat ="server" onchange ="countWeight('table')" style="width :30px" />
        </td>
        <td class ="td2">
            <textarea id = "performAction_0" name ="performAction_0" runat ="server" cols ="48" rows ="2"></textarea>
        </td>
        <td class ="td3">
            <select id = "GradesSelfA_0" name="GradesSelfA_0" runat = "server" style ="width:65px"></select>
        </td>
        <td class ="td4">
            <select id = "Supvr_0" name ="Supvr_0" runat = "server" style ="width:85px"></select>
        </td>
    </tr>
</table>
<input type = "button" runat ="server" id ="addTR" onclick ="Add_tr()" value="添加一行"/>&nbsp;&nbsp;&nbsp;
<input type = "button" runat ="server" id ="delTR" onclick ="Del_tr()" value="删除最后一行"/>&nbsp;&nbsp;&nbsp;
<asp:Label ID="lb_WeightTotal" runat="server" Text="" ></asp:Label>js:    function countWeight(obj)
    {
        var WeightT = 0;
        if (document.getElementById("<%=gv_perform.ClientID%>"))
        {
            var weightArr;
            weightArr = document.getElementById("<%=gv_perform.ClientID%>").getElementsByTagName("input");
            if(weightArr.length>0){
                for(var i = 0; i < weightArr.length; i++)
                {  
                    if(weightArr[i].id.indexOf("tb_weight"))
                    {
                        var weight = parseInt(weightArr[i].value);
                        if(weight<=100 && weight >0)
                        {
                            WeightT += parseInt(weightArr[i].value);
                        }
                        else
                        {
                            alert ("权重必须是0到100之间的数字！");
                        }
                    }
                }
            }
        }
        if (document .getElementById ("table_perform"))
        {
            var rowCount = table_perform .rows .length;
            for (var i=0 ;i< rowCount ;i++)
            {
                if (document .all["performWeight_"+i].value == "" || document .all["performWeight_"+i].value ==null)
                {                }
                else 
                {
                    var weight = parseInt(document .all["performWeight_"+i].value);
                    if(weight<=100 && weight >0)
                    {
                        WeightT += parseInt(document .all["performWeight_"+i].value);
                    }
                    else
                    {
                        alert ("权重必须是0到100之间的数字！");
                    }
                }
            }
        }
        document .all["lb_WeightTotal"].innerHTML = WeightT ;
        if(WeightT >100) alert ("权重和必须等于100！");
    };
    function Add_tr()
    {
        if (linenum ==0)
        {
            getoption ();
        }
        linenum =linenum +1;
        var tableobj = document .getElementById ("table_perform");
        var trobj = document .createElement ("tr");
        //trobj .setAttribute ("id","tr"+linenum);        // 添加td0
        var tdobj0 = document .createElement ("td");
        tdobj0 .setAttribute ("className","td0");
        var Areaobj = document .createElement ("textarea");
        Areaobj.setAttribute ("id","performArea_"+linenum );
        Areaobj.setAttribute ("name","performArea_"+linenum );
        Areaobj .setAttribute ("runat","server");
        Areaobj .setAttribute ("cols","40");
        Areaobj .setAttribute ("rows","2");
        tdobj0 .appendChild(Areaobj );
        trobj .appendChild (tdobj0 );
                
        // 添加td1
        var tdobj1 = document .createElement ("td");
        tdobj1 .setAttribute ("className","td1");
        var Weightobj = document .createElement ("input");
        Weightobj.setAttribute ("id","performWeight_"+linenum );
        Weightobj.setAttribute ("name","performWeight_"+linenum );
        Weightobj.setAttribute ("runat","server");
        Weightobj.setAttribute ("type","text");
        //Weightobj.style.width = "30px";
        tdobj1 .appendChild(Weightobj );
        trobj .appendChild (tdobj1 );        // 添加td2
        var tdobj2 = document .createElement ("td");
        tdobj2 .setAttribute ("className","td2");
        var Actionobj = document .createElement ("textarea");
        Actionobj.setAttribute ("id","performAction_"+linenum );
        Actionobj.setAttribute ("name","performAction_"+linenum );
        Actionobj .setAttribute ("runat","server");
        Actionobj .setAttribute ("cols","48");
        Actionobj .setAttribute ("rows","2");
        tdobj2 .appendChild(Actionobj );
        trobj .appendChild (tdobj2 );        // 添加td3
        var tdobj3 = document .createElement ("td");
        tdobj3 .setAttribute ("className","td3");
        var Gradeobj = document .createElement ("select");
        Gradeobj.setAttribute ("id","GradesSelfA_"+linenum );
        Gradeobj.setAttribute ("name","GradesSelfA_"+linenum );
        Gradeobj.setAttribute ("runat","server");
        //Gradeobj.style.width = "70px";
        tdobj3 .appendChild(Gradeobj );
        trobj .appendChild (tdobj3 );        // 添加td4
        var tdobj4 = document .createElement ("td");
        tdobj4 .setAttribute ("className","td4");
        var Supvrobj = document .createElement ("select");
        Supvrobj.setAttribute ("id","Supvr_"+linenum );
        Supvrobj.setAttribute ("name","Supvr_"+linenum );
        Supvrobj.setAttribute ("runat","server");
        //Supvrobj.style.width = "90px";
        tdobj4 .appendChild(Supvrobj );
        trobj .appendChild (tdobj4 );        tableobj .firstChild .appendChild (trobj);
        setoption1 ("GradesSelfA_"+linenum );
        setoption2 ("Supvr_"+linenum );
        document .getElementById ("performWeight_"+linenum ).style.width = "30px";
        document .getElementById ("GradesSelfA_"+linenum ).style.width = "65px";
        document .getElementById ("Supvr_"+linenum ).style.width = "85px";
        document .getElementById ("performWeight_"+linenum ).onchange = function(){countWeight ('table')};
    };
后台代码在下页

解决方案 »

  1.   


    后台代码：   Protected Sub submitt_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles submitt.Click
            Dim PerformTotal As String = lb_WeightTotal.Text.ToString.Trim
            If PerformTotal = "" Or PerformTotal <> "100" Then
                Dim type As Type = Me.GetType
                Page.ClientScript.RegisterStartupScript(type, "wrong", "alert('业绩指标的权重小计应为100,请修改权重！');", True)
            Else
                '判断是否已经提交过工作内容及自评
                Dim EKID As String = Request.QueryString("EKID")
                Dim sqlcommon1 As sqlCommon = New sqlCommon()
                Dim pams1 As SqlParameter() = {New SqlParameter("@EKID", EKID)}
                Dim dsIsExit As DataSet = New DataSet()
                sqlcommon1.RunProc("Proc_MyWork_IsExit", pams1, dsIsExit)
                If dsIsExit.Tables.Count > 1 Then
                    If dsIsExit.Tables(0).Rows.Count > 0 And dsIsExit.Tables(0).Rows(0).Item(0) > 0 Then
                        IsExit1 = True
                    End If
                    If dsIsExit.Tables(1).Rows.Count > 0 And dsIsExit.Tables(1).Rows(0).Item(0) > 0 Then
                        IsExit2 = True
                    End If
                End If            Dim sqlcommon As sqlCommon = New sqlCommon()
                Dim sqlText As String = ""
                sqlText += " BEGIN TRANSACTION "
                If gv_perform.Visible = True Then
                    For i As Integer = 0 To gv_perform.Rows.Count - 1
                        Dim ACID As String = gv_perform.Rows(i).Cells(0).Text.ToString
                        Dim tb_area As TextBox = gv_perform.Rows(i).FindControl("tb_area")
                        Dim tb_weight As TextBox = gv_perform.Rows(i).FindControl("tb_weight")
                        Dim tb_action As TextBox = gv_perform.Rows(i).FindControl("tb_action")
                        Dim ddl_GradesSelf_A As DropDownList = gv_perform.Rows(i).FindControl("ddl_GradesSelf_A")
                        Dim ddl_Supvr As DropDownList = gv_perform.Rows(i).FindControl("ddl_Supvr")                    sqlText += "update T_AssessContent set Key_Performance_Area ='" + tb_area.Text.ToString.Replace("'", "''").Replace(System.Environment.NewLine, "<br>") + "',weight=" + tb_weight.Text.ToString.Trim + ",Action = '" + tb_action.Text.ToString.Replace("'", "''").Replace(System.Environment.NewLine, "<br>") + "',Self_Appraisal='" + ddl_GradesSelf_A.SelectedValue.ToString.Trim + "',SupvrWid=" + ddl_Supvr.SelectedValue.ToString.Trim + " where ACID =" + ACID.ToString.Trim
                    Next
                End If
                If table_perform.Visible = True Then
                    For i As Integer = 0 To table_perform.Rows.Count - 1
                        Dim performArea As HtmlTextArea = table_perform.Rows(i).FindControl("performArea_" + i.ToString)
                        Dim performWeight As HtmlInputText = table_perform.Rows(i).FindControl("performWeight_" + i.ToString)
                        Dim performAction As HtmlTextArea = table_perform.Rows(i).FindControl("performAction_" + i.ToString)
                        Dim GradesSelfA As HtmlSelect = table_perform.Rows(i).FindControl("GradesSelfA_" + i.ToString)
                        Dim Supvr As HtmlSelect = table_perform.Rows(i).FindControl("Supvr_" + i.ToString)                    sqlText += "insert into T_AssessContent(EKID,ParentQid,Key_Performance_Area,weight,Action,Self_Appraisal,SupvrWid)values(" + EKID + ",1,'" + performArea.InnerText.ToString.Replace("'", "''").Replace(System.Environment.NewLine, "<br>") + "'," + performWeight.Value.ToString + ",'" + performAction.InnerText.ToString.Replace("'", "''").Replace(System.Environment.NewLine, "<br>") + "','" + GradesSelfA.Value.ToString.Trim + "'," + Supvr.Value.ToString + ")"
                    Next
                End If
                 sqlText += " COMMIT "
                If sqlcommon.RunSqltext(sqlText) = 1 Then
                    Dim type As Type = Me.GetType
                    Page.ClientScript.RegisterStartupScript(type, "wrong", "alert('提交成功！')", True)
                    Response.Write("<script > window.open('','_self');top.opener=null;top.close();</script>")
                Else
                    Dim type As Type = Me.GetType
                    Page.ClientScript.RegisterStartupScript(type, "wrong", "alert('提交失败,请重新检查数据！');", True)
                End If
            End If
        End Sub
      

  2.   

    JS还混了ASP代码，看的头晕，直接用AJAX提交到后台不就得了！
      

  3.   

    如果你确实修改成功了，应该在后台就能拿到，你在提交之前，把label的值弹出来看看，到底有没有修改
      

  4.   

    lable是动态添加的，提交之后就找不到了，所以使用了<input type ="hidden"> 把值给存了下来，在后台就可以取到了，谢谢两位