Telerik RadGrid導出到Excel。 '='運算符前缺少操作數

Question

我收到錯誤 '='運算符前缺少操作數。 當我嘗試導出和代碼在網格中正常運行。 這是Web部件的代碼。該錯誤只發生在rebind上。它在網格中正常工作。有什麼辦法可以縮小錯誤的確切內容嗎？ 我願意爲這個問題提供支持/解決方案，我只是需要它的工作。

[Guid("5fbe4ccf-4d90-476b-af77-347de4e1176c")] 
public class ParentChildGrid : Microsoft.SharePoint.WebPartPages.WebPart 

{ 


#region 
Variables 
private bool _error = false; 
private string _PageSize = null; 
private string _ParentList = null; 
private string _ParentView = null; 
private string _ParentIDField = null; 
private string _FirstChildList = null; 
private string _FirstChildView = null; 
private string _FirstChildIDField = null; 
private string _FirstChildParentIDField = null; 
private string _SecondChildList = null; 
private string _SecondChildView = null; 
private string _SecondChildIDField = null; 
private string _SecondChildParentIDField = null; 
protected ScriptManager scriptManager; 
protected RadAjaxManager ajaxManager; 
protected Panel panel; 
protected SPView oView; 
protected RadGrid oGrid = new RadGrid(); 
protected Label label; 
protected DataTable ParentDataTable; 
protected DataTable Child1DataTable; 
protected DataTable Child2DataTable; 
protected Button cmdExport = new Button(); 

#endregion 
#region 
Properties 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel. 
Category("Parent Child Properties")] 
[WebDisplayName("Items Per Page")] 
[WebDescription("# of items to include in each page.")] 
public string PageSize 
{ 
    get 

    { 
     if (_PageSize == null) 
     { 
      _PageSize = "100"; 
     } 
     return _PageSize.Trim(); 
    } 
    set { _ParentList = value.Trim(); } 
} 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel. 
Category("Parent Child Properties")] 
[WebDisplayName("ParentList")] 
[WebDescription("Parent List in Grid View")] 
public string ParentList 
{ 
    get 

    { 
     if (_ParentList == null) 
     { 
      _ParentList = ""; 
     } 
     return _ParentList.Trim(); 
    } 
    set { _ParentList = value.Trim(); } 
} 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel.Category("Parent Child Properties")] 
[WebDisplayName("ParentView")] 
[WebDescription("View for Parent List")] 
public string ParentView 
{ 
    get 

    { 
     if (_ParentView == null) 
     { 
      _ParentView = ""; 
     } 
     return _ParentView.Trim(); 
    } 
    set { _ParentView = value.Trim(); } 
} 
[ 
Personalizable(PersonalizationScope.Shared)] 
[ 
WebBrowsable(true)] 
[System.ComponentModel. 
Category("Parent Child Properties")] 
[ 
WebDisplayName("ParentIDField")] 
[ 
WebDescription("ID Field in Parent List")] 
public string ParentIDField 
{ 
    get 

    { 
     if (_ParentIDField == null) 
     { 
      _ParentIDField = ""; 
     } 
     return _ParentIDField.Trim(); 
    } 
    set { _ParentIDField = value.Trim(); } 
} 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel. 
Category("Parent Child Properties")] 
[WebDisplayName("FirstChildList")] 
[WebDescription("FirstChildList Name")] 
public string FirstChildList 
{ 
    get 

    { 
     if (_FirstChildList == null) 
     { 
      _FirstChildList = ""; 
     } 
     return _FirstChildList.Trim(); 
    } 
    set { _FirstChildList = value.Trim(); } 
} 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel.Category("Parent Child Properties")] 
[WebDisplayName("FirstChildView")] 
[WebDescription("First Child View Name")] 
public string FirstChildView 
{ 
    get 

    { 
     if (_FirstChildView == null) 
     { 
      _FirstChildView = ""; 
     } 
     return _FirstChildView.Trim(); 
    } 
    set { _FirstChildView = value.Trim(); } 
} 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel.Category("Parent Child Properties")] 
[WebDisplayName("FirstChildIDField")] 
[WebDescription("First Child ID Field (Tyically ID)")] 
public string FirstChildIDField 
{ 
    get 

    { 
     if (_FirstChildIDField == null) 
     { 
      _FirstChildIDField = ""; 
     } 
     return _FirstChildIDField.Trim(); 
    } 
    set { _FirstChildIDField = value.Trim(); } 
} 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel.Category("Parent Child Properties")] 
[WebDisplayName("FirstChildParentIDField")] 
[WebDescription("First Child Parent ID Field")] 
public string FirstChildParentIDField 
{ 
    get 

    { 
     if (_FirstChildParentIDField == null) 
     { 
      _FirstChildParentIDField = ""; 
     } 
     return _FirstChildParentIDField.Trim(); 
    } 
    set { _FirstChildParentIDField = value.Trim(); } 
} 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel. 
Category("Parent Child Properties")] 
[WebDisplayName("SecondChildList")] 
[WebDescription("Second Child List")] 
public string SecondChildList 
{ 
    get 
    { 
     if (_SecondChildList == null) 
     { 
      _SecondChildList = ""; 
     } 
     return _SecondChildList.Trim(); 
    } 
    set { _SecondChildList = value.Trim(); } 
} 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel. 
Category("Parent Child Properties")] 
[WebDisplayName("SecondChildView")] 
[ 
WebDescription("Second Child View")] 
public string SecondChildView 
{ 
    get 
    { 
     if (_SecondChildView == null) 
     { 
      _SecondChildView = ""; 
     } 
     return _SecondChildView.Trim(); 
    } 
    set { _SecondChildView = value.Trim(); } 
} 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel. 
Category("Parent Child Properties")] 
[WebDisplayName("SecondChildIDField")] 
[WebDescription("Second Child ID Field (Typically ID)")] 
public string SecondChildIDField 
{ 
    get 

    { 
     if (_SecondChildIDField == null) 
     { 
      _SecondChildIDField = ""; 
     } 
     return _SecondChildIDField.Trim(); 
    } 
    set { _SecondChildIDField = value.Trim(); } 
} 
[Personalizable(PersonalizationScope.Shared)] 
[WebBrowsable(true)] 
[System.ComponentModel.Category("Parent Child Properties")] 
[WebDisplayName("SecondChildParentIDField")] 
[WebDescription("Second Child ID Field")] 
public string SecondChildParentIDField 
{ 
    get 

    { 
     if (_SecondChildParentIDField == null) 
     { 
      _SecondChildParentIDField = ""; 
     } 
     return _SecondChildParentIDField.Trim(); 
    } 
    set { _SecondChildParentIDField = value.Trim(); } 
} 

#endregion 

private const string ByeByeIncludeScriptKey = "myByeByeIncludeScript"; 
private const string EmbeddedScriptFormat = "<script language=javascript>function ByeBye(){ alert('Test Code'); }</script> "; 
private const string DisableAjaxScriptKey = "myDisableAjaxIncludeScript"; 
private const string DisableAjaxForExport = "<script language=javascript>function onRequestStart(sender, args) { if (args.get_eventTarget().indexOf(\"cmdExport\") >= 0);args.set_enableAjax(false);alert('Ajax Disabled'); }</script>"; 
private void WebPart_ClientScript_PreRender(object sender , System.EventArgs e) 
{ 
    if (!Page.IsClientScriptBlockRegistered(ByeByeIncludeScriptKey)) 
    Page.RegisterClientScriptBlock(ByeByeIncludeScriptKey, 
    EmbeddedScriptFormat); 
    if (!Page.IsClientScriptBlockRegistered(DisableAjaxScriptKey)) 
    Page.RegisterClientScriptBlock(DisableAjaxScriptKey, 
    DisableAjaxForExport); 
    //ajaxManager.ClientEvents.OnRequestStart = "onRequestStart"; 

} 
public ParentChildGrid() 
{ 
    this.ExportMode = WebPartExportMode.All; 
    this.PreRender += new EventHandler(WebPart_ClientScript_PreRender); 
} 
private void onRequestStart() 
{ 
    ajaxManager.EnableAJAX = 
    false; 
} 
protected override void OnInit(EventArgs e) 
{ 
    try 

    { 
     base.OnInit(e); 
     Page.ClientScript.RegisterStartupScript(
     typeof(ParentChildGrid), this.ID, "_spOriginalFormAction = document.forms[0].action;_spSuppressFormOnSubmitWrapper=true;", true); 
     if (this.Page.Form != null) 
     { 
      string formOnSubmitAtt = this.Page.Form.Attributes["onsubmit"]; 
      if (!string.IsNullOrEmpty(formOnSubmitAtt) && formOnSubmitAtt == "return _spFormOnSubmitWrapper();") 
      { 
       this.Page.Form.Attributes["onsubmit"] = "_spFormOnSubmitWrapper();"; 
      } 
     } 
     scriptManager = 
     ScriptManager.GetCurrent(this.Page); 
     if (scriptManager == null) 
     { 
      scriptManager = 
      new RadScriptManager(); 
      this.Page.Form.Controls.AddAt(0, scriptManager); 
     } 
     scriptManager.RegisterPostBackControl(cmdExport); 
    } 
    catch (Exception ex) 
    { 
     HandleException(ex); 
    } 
} 
protected override void OnLoad(EventArgs e) 
{ 
    ScriptManager.GetCurrent(Page).RegisterPostBackControl(cmdExport); 
    if (!_error) 
    { 
     try 

     { 
      base.OnLoad(e); 
      this.EnsureChildControls(); 
      base.OnLoad(e); 
      if (_ParentList != null) 
      { 
       if (_ParentList != "") 
       { 
        panel = 
        new Panel(); 
        panel.ID = 
        "Panel1"; 
        this.Controls.Add(panel); 
        oGrid = 
        new RadGrid(); 
        DefineComplexGrid(); 
        oGrid.GridExporting += 
        new OnGridExportingEventHandler(oGrid_GridExporting); 
        panel.Controls.Add(oGrid); 
        //DefineSimpleMasterDetail(); 

        cmdExport.Click += 
        new EventHandler(cmdExport_Click); 
        cmdExport.Text = 
        "Export"; 
        Button cmdExpandAll = new Button(); 
        cmdExpandAll.Text = 
        "Expand All"; 
        cmdExpandAll.Click += 
        new EventHandler(cmdExpandAll_Click); 
        panel.Controls.Add(cmdExpandAll); 
        ajaxManager = 
        RadAjaxManager.GetCurrent(this.Page); 
        if (ajaxManager == null) 
        { 
         ajaxManager = 
         new RadAjaxManager(); 
         ajaxManager.ID = 
         "RadAjaxManager1"; 
         Controls.Add(ajaxManager); 
         this.Page.Items.Add(typeof(RadAjaxManager), ajaxManager); 
        } 
        ajaxManager.AjaxSettings.AddAjaxSetting(oGrid, panel); 
        panel.Controls.Add(cmdExport); 
        ajaxManager.AjaxRequest += 
        new RadAjaxControl.AjaxRequestDelegate(ajaxManager_AjaxRequest); 
        this.Controls.Add(new LiteralControl("<br><br>&lt;input class='ms-SPButton' value=\'Test Code\' type=button onclick=\"ByeBye();\" &gt;")); 
        ajaxManager.ClientEvents.OnRequestStart = 
        "onRequestStart"; 
       } 
      } 
     } 
     catch (Exception ex) 
     { 
      HandleException(ex); 
     } 
    } 
} 
void oGrid_GridExporting(object source, GridExportingArgs e) 
{ 
    //throw new NotImplementedException(); 

} 
void ajaxManager_AjaxRequest(object sender, AjaxRequestEventArgs e) 
{ 
    ajaxManager.EnableAJAX = 
    false; 
} 
void cmdExpandAll_Click(object sender, EventArgs e) 
{ 
    try 

    { 
     foreach (GridItem item in oGrid.MasterTableView.Items) 
     { 
      item.Expanded = 
      true; 
     } 
    } 
    catch (Exception ex) 
    { 
     HandleException(ex); 
    } 
} 
void cmdExport_Click(object sender, EventArgs e) 
{ 
    try 

    { 
     ajaxManager.ClientEvents.OnRequestStart = 
     "onRequestStart"; 
     oGrid.ExportSettings.ExportOnlyData = 
     true; 
     oGrid.ExportSettings.IgnorePaging = 
     true; 
     oGrid.ExportSettings.OpenInNewWindow = 
     true; 
     oGrid.MasterTableView.HierarchyDefaultExpanded = 
     true; 
     if (FirstChildList.Trim() != "") 
     oGrid.MasterTableView.DetailTables[0].HierarchyDefaultExpanded = 
     true; 
     if (SecondChildList.Trim() != "") 
     oGrid.MasterTableView.DetailTables[1].HierarchyDefaultExpanded = 
     true; 
     oGrid.Rebind(); 
     oGrid.MasterTableView.ExportToExcel(); 
    } 
    catch (Exception ex) 
    { 
     HandleException(ex); 
    } 
} 
//private void DefineSimpleGrid() 

//{ 

    // try 

    // { 

     // oGrid.ID = "Master"; 

     // oGrid.PageSize = 10; 

     // oGrid.AllowPaging = true; 

     // oGrid.AllowSorting = true; 

     // oGrid.Skin = "WebBlue"; 

     // oGrid.GroupingEnabled = true; 

     // oGrid.NeedDataSource += new GridNeedDataSourceEventHandler(oGrid_NeedDataSource); 

     // oGrid.ShowStatusBar = true; 

     // oGrid.ShowGroupPanel = true; 

     // oGrid.GroupingEnabled = true; 

     // oGrid.ClientSettings.AllowDragToGroup = true; 

     // oGrid.ClientSettings.AllowColumnsReorder = true; 

    // } 

    // catch (Exception ex) 

    // { 

     // HandleException(ex); 

    // } 

//} 

private DataTable GetDataTable(String cListName, String ViewName) 
{ 
    try 

    { 
     SPList list = SPContext.Current.Web.Lists[cListName]; 
     SPView view = list.Views[ViewName]; 
     SPListItemCollection items = list.GetItems(view); 
     if (items != null) 
     { 
      if (items.Count &gt; 0) 
      return items.GetDataTable(); 
     } 
    } 
    catch (Exception ex) 
    { 
     HandleException(ex); 
    } 
    return null; 
} 
//private void DefineSimpleMasterDetail() 

//{ 

    // try 

    // { 

     // oGrid.MasterTableView.DataKeyNames = new string[] { "ID" }; 

     // oGrid.Skin = "Default"; 

     // oGrid.Width = Unit.Percentage(100); 

     // oGrid.PageSize = 5; 

     // oGrid.AllowPaging = true; 

     // oGrid.MasterTableView.PageSize = 15; 

     // oGrid.MasterTableView.DataSource = GetDataTable(_ParentList, _ParentView); 

     // GridTableView tableViewOrders = new GridTableView(oGrid); 

     // tableViewOrders.DataSource = GetDataTable(_FirstChildList, _FirstChildView); 

     // tableViewOrders.DataKeyNames = new string[] { _ParentIDField }; 

     // GridRelationFields relationFields = new GridRelationFields(); 

     // relationFields.MasterKeyField = _FirstChildIDField; 

     // relationFields.DetailKeyField = _FirstChildParentIDField; 

     // tableViewOrders.ParentTableRelation.Add(relationFields); 

     // oGrid.MasterTableView.DetailTables.Add(tableViewOrders); 

    // } 

    // catch (Exception ex) 

    // { 

     // HandleException(ex); 

    // } 

//} 

private void DefineComplexGrid() 
{ 
    try 

    { 
     oGrid.ID = 
     "RadGrid1"; 
     //oGrid.Width = Unit.Percentage(98); 

     oGrid.PageSize = 
     Convert.ToInt32(PageSize); 
     oGrid.AllowPaging = 
     true; 
     oGrid.AllowSorting = 
     true; 
     oGrid.PagerStyle.Mode = 
     GridPagerMode.NextPrevAndNumeric; 
     oGrid.ShowStatusBar = 
     true; 
     oGrid.ClientSettings.Resizing.AllowColumnResize = 
     true; 
     oGrid.DetailTableDataBind += 
     new GridDetailTableDataBindEventHandler(oGrid_DetailTableDataBind); 
     oGrid.NeedDataSource += 
     new GridNeedDataSourceEventHandler(oGrid_NeedDataSource); 
     oGrid.ColumnCreated += 
     new GridColumnCreatedEventHandler(oGrid_ColumnCreated); 
     oGrid.MasterTableView.Name = _ParentList; 
     if (_FirstChildList != "" || _SecondChildList != "") 
     { 
      oGrid.MasterTableView.PageSize = 
      Convert.ToInt32(PageSize); 
      oGrid.MasterTableView.DataKeyNames = 
      new string[] { _ParentIDField }; 
      oGrid.MasterTableView.HierarchyLoadMode = 
      GridChildLoadMode.ServerOnDemand; 
     } 
     if (_FirstChildList != "") 
     { 
      GridTableView tableViewFirstChild = new GridTableView(oGrid); 
      tableViewFirstChild.Width = 
      Unit.Percentage(100); 
      tableViewFirstChild.HierarchyLoadMode = 
      GridChildLoadMode.ServerOnDemand; 
      tableViewFirstChild.DataKeyNames = 
      new string[] { _FirstChildIDField }; 
      tableViewFirstChild.Name = _FirstChildList; 
      GridRelationFields FirstChildrelationFields = new GridRelationFields(); 
      FirstChildrelationFields.MasterKeyField = _ParentIDField; 
      FirstChildrelationFields.DetailKeyField = _FirstChildParentIDField; 
      tableViewFirstChild.ParentTableRelation.Add(FirstChildrelationFields); 
      tableViewFirstChild.Caption = _FirstChildList; 
      oGrid.MasterTableView.DetailTables.Add(tableViewFirstChild); 
     } 
     if (_SecondChildList != "") 
     { 
      GridTableView tableViewSecondChild = new GridTableView(oGrid); 
      tableViewSecondChild.Width = 
      Unit.Percentage(100); 
      tableViewSecondChild.HierarchyLoadMode = 
      GridChildLoadMode.ServerOnDemand; 
      tableViewSecondChild.DataKeyNames = 
      new string[] { _SecondChildIDField }; 
      tableViewSecondChild.Name = _SecondChildList; 
      GridRelationFields SecondChildrelationFields = new GridRelationFields(); 
      SecondChildrelationFields.MasterKeyField = _ParentIDField; 
      SecondChildrelationFields.DetailKeyField = _SecondChildParentIDField; 
      tableViewSecondChild.Caption = _SecondChildList; 
      tableViewSecondChild.ParentTableRelation.Add(SecondChildrelationFields); 
      oGrid.MasterTableView.DetailTables.Add(tableViewSecondChild); 
     } 
     oGrid.ShowStatusBar = 
     true; 
     oGrid.ShowGroupPanel = 
     true; 
     oGrid.GroupingEnabled = 
     true; 
     oGrid.ClientSettings.AllowDragToGroup = 
     true; 
     oGrid.ClientSettings.AllowColumnsReorder = 
     true; 
     oGrid.Skin = 
     "Web20"; 
    } 
    catch (Exception ex) 
    { 
     HandleException(ex); 
    } 
} 
void oGrid_ColumnCreated(object sender, GridColumnCreatedEventArgs e) 
{ 
    try 

    { 
     //if (e.Column.HeaderText == "ID" || e.Column.HeaderText == "Created") 

     //{ 

      // e.Column.Display = false; 

      // return; 

     //} 

     String cOwnerTable = ""; 
     cOwnerTable = e.OwnerTableView.Name; 
     if (cOwnerTable.Trim() != "" && e.Column.HeaderText != "" && e.Column.HeaderText != _FirstChildParentIDField && e.Column.HeaderText != _SecondChildParentIDField) 
     { 
      SPList CurrentList = SPContext.Current.Web.Lists[e.OwnerTableView.Name]; 
      e.Column.HeaderText = GetFieldDisplayName(e.Column.HeaderText, CurrentList); 
      SPField oField = CurrentList.Fields[e.Column.HeaderText]; 
      GridBoundColumn col = (GridBoundColumn)e.Column; 
      switch (oField.Type) 
      { 
       case SPFieldType.Currency: 
       col.DataFormatString = 
       "{0:C}"; 
       break; 
       case SPFieldType.DateTime: 
       SPFieldDateTime oDateTime = (SPFieldDateTime)oField; 
       if (oDateTime.DisplayFormat == SPDateTimeFieldFormatType.DateOnly) 
       col.DataFormatString = 
       "{0:d}"; 
       break; 
       default: 
       break; 
      } 
     } 
    } 
    catch (Exception ex) 
    { 
     HandleException(ex); 
    } 
} 
private DataTable GetChildDataTable(GridDetailTableDataBindEventArgs e, String cChildListName, String cChildView,String cParentIDField) 
{ 
    try 

    { 
     GridDataItem parentItem = e.DetailTableView.ParentItem as GridDataItem; 
     SPList FirstChildList = SPContext.Current.Web.Lists[cChildListName]; 
     SPView oView = FirstChildList.Views[cChildView]; 
     String cContractID = parentItem[_ParentIDField].Text; 
     SPQuery oChildQuery = new SPQuery(); 
     if (Occurs(cParentIDField, oView.Query) == 2) 
     { 
      String cNewQuery = oView.Query; 
      Int32 iPos = cNewQuery.IndexOf(cParentIDField) + cParentIDField.Length; 
      String cPartOne = cNewQuery.Substring(0,cNewQuery.IndexOf(cParentIDField, iPos)); 
      String cPartTwo = cNewQuery.Substring(cNewQuery.IndexOf(cParentIDField, iPos) + cParentIDField.Length); 
      cNewQuery = cPartOne + cContractID + cPartTwo; 
      oChildQuery.Query = cNewQuery; 
      oChildQuery.Query = 
      "&lt;Where&gt;&lt;Eq&gt;&lt;FieldRef Name='" + cParentIDField + "' /&gt;&lt;Value Type='Text'&gt;" + cContractID + "&lt;/Value&gt;&lt;/Eq&gt;&lt;/Where&gt;"; 
     } 
     else 

     { 
      oChildQuery.Query = 
      "&lt;Where&gt;&lt;Eq&gt;&lt;FieldRef Name='" + cParentIDField + "' /&gt;&lt;Value Type='Text'&gt;" + cContractID + "&lt;/Value&gt;&lt;/Eq&gt;&lt;/Where&gt;"; 
     } 
     SPViewFieldCollection oViewFields = oView.ViewFields; 
     oViewFields.Add(cParentIDField); 
     String cViewFields = oViewFields.SchemaXml; 
     oChildQuery.ViewFields = cViewFields; 
     SPListItemCollection items = FirstChildList.GetItems(oChildQuery); 
     if (items != null) 
     { 
      if (items.Count &gt; 0) 
      { 
       return items.GetDataTable(); 
      } 
     } 
    } 
    catch (Exception ex) 
    { 
     //HandleException(ex); 

    } 
    return null; 
} 
void oGrid_DetailTableDataBind(object source, GridDetailTableDataBindEventArgs e) 
{ 
    try 

    { 
     GridDataItem parentItem = e.DetailTableView.ParentItem as GridDataItem; 
     if (parentItem.Edit) 
     { 
      return; 
     } 
     if (e.DetailTableView.Name == _FirstChildList) 
     { 
      Child1DataTable = GetChildDataTable(e, _FirstChildList, _FirstChildView, _FirstChildParentIDField); 
      e.DetailTableView.DataSource = Child1DataTable; 
     } 
     if (e.DetailTableView.Name == _SecondChildList) 
     { 
      Child2DataTable = GetChildDataTable(e, _SecondChildList, _SecondChildView, _SecondChildParentIDField); 
      e.DetailTableView.DataSource = Child2DataTable; 
     } 
    } 
    catch (Exception ex) 
    { 
     HandleException(ex); 
    } 
} 
void oGrid_NeedDataSource(object source, GridNeedDataSourceEventArgs e) 
{ 
    try 

    { 
     if (!e.IsFromDetailTable) 
     { 
      SPList ParentList = SPContext.Current.Web.Lists[_ParentList]; 
      oView = ParentList.Views[_ParentView]; 
      SPQuery ParentQuery = new SPQuery(); 
      ParentQuery.Query = oView.Query; 
      ParentQuery.RowLimit = 100000; 
      ParentQuery.ViewFields = oView.ViewFields.SchemaXml; 
      SPListItemCollection oItems = SPContext.Current.Web.Lists[_ParentList].GetItems(ParentQuery); 
      ParentDataTable = oItems.GetDataTable(); 
      oGrid.DataSource = ParentDataTable; 
     } 
    } 
    catch (Exception ex) 
    { 
     HandleException(ex); 
    } 
} 
private string GetFieldDisplayName(String cInternalName, SPList oList) 
{ 
    try 
    { 
     foreach (SPField field in oList.Fields) 
     { 
      if (field.InternalName == cInternalName) 
      return field.Title; 
     } 
    } 
    catch (Exception ex) 
    { 
     HandleException(ex); 
    } 
    return cInternalName; 
} 
private Int32 Occurs(String SearchFor, String SearchIn) 
{ 
    Int32 Count = 0; 
    Int32 iPos = 0; 
    try 
    { 
     while (SearchIn.IndexOf(SearchFor, iPos) != -1) 
     { 
      Count++; 
      iPos = SearchIn.IndexOf(SearchFor, iPos) + 1; 
     } 
    } 
    catch (Exception ex) 
    { 
     HandleException(ex); 
    } 
    return Count; 
} 
private void HandleException(Exception ex) 
{ 
    this._error = true; 
    try 
    { 
     this.Controls.Clear(); 
     this.Controls.Add(new LiteralControl(ex.Message)); 
    } 
    catch 
    { 
    } 
} 
} //End Class 

Answer 1

作爲後續工作，看來問題是John的原始數據中存在NULL值。這些空值在數據導出期間造成問題。修復空值也修復了Excel導出。在Telerik.com論壇原來的解決方案：

http://www.telerik.com/community/forums/aspnet-ajax/grid/extremely-frustrated-please-help-with-radgrid-export-of-multi-tabe-view.aspx

希望幫助任何跟進。