用了Ivan的方法,还是同样的错误: Microsoft JScript runtime error: 'null' is null or not an objectparss:datagrid是没有指定datasource,但这个对象是存在的,你说的赋值是指赋什么值?
实际上这个动态绑定datagrid的是在网上搜的一个例子,我往上套用的。但是在 function get_DataGrid_Result_CallBack(response) 这个里面引用datagrid不成功。提示null. 卡住不动了。 <p title="Warehouse Web version-Location Transfer "> <asp:DataGrid ID="mydatagrid" runat="server" AutoGenerateColumns="False" Height="176px" Width="693px"> </asp:DataGrid> </p>function DataGridResult() { var PONO=document.getElementById("txtPONO"); var Lot=document.getElementById("DropDLLot"); var Shade=document.getElementById("DropDLShade"); var Location1=document.getElementById("DropDLLocation1"); var Location2=document.getElementById("DropDLLocation2"); AjaxTransfer.getDataGrid(PONO.value,Lot.item(Lot.selectedindex).text,Shade.item(Shade.selectedindex).text ,Location1.item(Location1.selectedindex).text, Location2.item(Location2.selectedindex).text,get_DataGrid_Result_CallBack );
}function get_DataGrid_Result_CallBack(response) { if (response.value != null) { var ds = response.value; if(ds != null && typeof(ds) == "object" && ds.Tables != null) { var cc=document.getElementById('mydatagrid'); cc.innerHTML=AjaxTransfer.RefreshDataGrid(ds.Tables[0]).value; } } } <Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)> _ Public Function getDataGrid(ByVal PONO As String, ByVal Lot As String, ByVal Shade As String _ , ByVal Loc1 As String, ByVal Loc2 As String) As DataSet Dim ds As DataSet ds = GetDataSet(PONO, "LOC2", Lot, Shade, Loc1, Loc2) Return ds End Function <Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)> _ Private Function RefreshDataGrid(ByRef dtLocation As DataTable) As String '//实例化一个datagird类并设置好数据源 Dim dg As DataGrid = New DataGrid() dg.DataSource = dtLocation dg.DataBind() '//实例化一个HtmlTextWriter的类 Dim strb As System.Text.StringBuilder = New System.Text.StringBuilder() Dim sw As System.IO.StringWriter = New System.IO.StringWriter(strb) Dim htw As System.Web.UI.HtmlTextWriter = New HtmlTextWriter(sw) '//执行控件的render并输出到HtmlTextWriter里 dg.RenderControl(htw) Dim s As String = strb.ToString() Return s '//最后就是返回这个html啦 End Function
Microsoft JScript runtime error: 'null' is null or not an objectparss:datagrid是没有指定datasource,但这个对象是存在的,你说的赋值是指赋什么值?
function get_DataGrid_Result_CallBack(response) 这个里面引用datagrid不成功。提示null.
卡住不动了。
<p title="Warehouse Web version-Location Transfer ">
<asp:DataGrid ID="mydatagrid" runat="server" AutoGenerateColumns="False" Height="176px"
Width="693px">
</asp:DataGrid>
</p>function DataGridResult()
{
var PONO=document.getElementById("txtPONO");
var Lot=document.getElementById("DropDLLot");
var Shade=document.getElementById("DropDLShade");
var Location1=document.getElementById("DropDLLocation1");
var Location2=document.getElementById("DropDLLocation2");
AjaxTransfer.getDataGrid(PONO.value,Lot.item(Lot.selectedindex).text,Shade.item(Shade.selectedindex).text
,Location1.item(Location1.selectedindex).text, Location2.item(Location2.selectedindex).text,get_DataGrid_Result_CallBack );
document.getElementById("DropDLLot").disabled = false;
document.getElementById("DropDLShade").disabled = false;
document.getElementById("DropDLLocation1").disabled = false;
document.getElementById("DropDLLocation2").disabled = false;
// document.getElementById("DropDLTL1").Text = "";
// document.getElementById("DropDLTL2").Text = "";
}function get_DataGrid_Result_CallBack(response)
{
if (response.value != null)
{
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
var cc=document.getElementById('mydatagrid');
cc.innerHTML=AjaxTransfer.RefreshDataGrid(ds.Tables[0]).value; }
}
} <Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)> _
Public Function getDataGrid(ByVal PONO As String, ByVal Lot As String, ByVal Shade As String _
, ByVal Loc1 As String, ByVal Loc2 As String) As DataSet
Dim ds As DataSet
ds = GetDataSet(PONO, "LOC2", Lot, Shade, Loc1, Loc2)
Return ds End Function
<Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)> _
Private Function RefreshDataGrid(ByRef dtLocation As DataTable) As String '//实例化一个datagird类并设置好数据源
Dim dg As DataGrid = New DataGrid()
dg.DataSource = dtLocation
dg.DataBind()
'//实例化一个HtmlTextWriter的类
Dim strb As System.Text.StringBuilder = New System.Text.StringBuilder()
Dim sw As System.IO.StringWriter = New System.IO.StringWriter(strb)
Dim htw As System.Web.UI.HtmlTextWriter = New HtmlTextWriter(sw)
'//执行控件的render并输出到HtmlTextWriter里
dg.RenderControl(htw)
Dim s As String = strb.ToString()
Return s '//最后就是返回这个html啦
End Function