Question

我有一个RadGrid，它的行和列是以编程方式创建的，并且有一个RadAjaxManager设置为更新SelectedIndexChange上的另一个Panel。 RadGrid还启用了滚动功能并禁用了multirowselect。 RadGrid按预期运行，但是一旦滚动它就会开始收集所选项目。我已设置断点并通过监视验证SelectedItems.Count增长大于1.这也阻止在滚动后选择先前选定的行。我已经尝试清除页面卸载事件中的所选项目，但是当它呈现时，它有时会显示多个项目被选中。我有时说，因为它与这个问题不一致。只有我注意到的模式是滚动才会启动问题。

第二个问题是，每次页面回发列标题时都会消失。这个让我很困惑，不知道是什么原因造成的。

我很感激有关这方面的任何建议。我也会包含我的代码。谢谢，我为糟糕的格式道歉。我还在努力解决这个问题。

P.S。我包含的代码设置为为列和行创建文本，因此不需要实际数据。您可以轻松复制并粘贴相同的代码，以查看我所看到的内容。

<rad:RadScriptManager ID="scm" runat="server"> </rad:RadScriptManager>

<rad:RadAjaxManager ID="AjaxManager" runat="server">
      <AjaxSettings>
      <rad:AjaxSetting AjaxControlID="grdCustomerAssignments">
      <UpdatedControls>
          <rad:AjaxUpdatedControl ControlID="grdCustomerAssignments" LoadingPanelID="pnlLoading1" />
      </UpdatedControls>
      </rad:AjaxSetting>
      <rad:AjaxSetting AjaxControlID="grdCustomerAssignments">
       <UpdatedControls>
        <rad:AjaxUpdatedControl ControlID="pnlDetails" />
       </UpdatedControls>
      </rad:AjaxSetting>
      </AjaxSettings>
  </rad:RadAjaxManager>

<rad:RadGrid ID="grdCustomerAssignments" runat="server" Skin="WebBlue" AutoGenerateColumns="false" AllowMultiRowSelection="false" OnNeedDataSource="grdCustomerAssignments_NeedDataSource" OnSelectedIndexChanged="grdCustomerAssignments_SelectedIndexChanged" OnSortCommand="grdCustomerAssignments_SortCommand">

<ClientSettings EnablePostBackOnRowClick="true" >
<ClientEvents/>
<Scrolling AllowScroll="true" ScrollHeight="350" UseStaticHeaders="true" SaveScrollPosition="true" />
<Selecting AllowRowSelect="true" />
<Resizing AllowColumnResize="true" />
</ClientSettings>

<MasterTableView DataKeyNames="ID" >

<HeaderStyle Wrap="false" HorizontalAlign="Center" VerticalAlign="Middle" Font-Bold="true" />
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Wrap="false" />
<AlternatingItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Wrap="false" />

<NoRecordsTemplate>
<div style="font-size:80%; color:Maroon;">No Items Were Found</div>
</NoRecordsTemplate>

</MasterTableView>

</rad:RadGrid>

<asp:Panel ID="pnlDetails" runat="server">
<rad:RadTabStrip ID="tabStrip" runat="server" Align="Justify" AppendDataBoundItems="false" SelectedIndex="0" MultiPageID="multiPage" Skin="WebBlue">
<Tabs></Tabs>
</rad:RadTabStrip>
<rad:RadMultiPage ID="multiPage" runat="server"></rad:RadMultiPage>
</asp:Panel>

protected DataTable Assignments { get; set; }  
protected Dictionary<string, IList<int>> TabTitles { get; set; }  


protected void Page_Init(object sender, EventArgs e)  
{  
  GetAssignments();  
  if (!IsPostBack)  
    AddColumnsToGrid();  
}  

protected void Page_Load(object sender, EventArgs e)  
{  
  tabStrip.Tabs.Clear();  
  multiPage.Controls.Clear();  
}  

protected void Page_UnLoad(object sender, EventArgs e)  
{  
  grdCustomerAssignments.MasterTableView.ClearSelectedItems();  
}  

protected void grdCustomerAssignments_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)  
{  
  grdCustomerAssignments.DataSource = Assignments;  
}  

protected void grdCustomerAssignments_SelectedIndexChanged(object sender, EventArgs e)  
{  
  try  
  {  
     string id = ((RadGrid)sender).SelectedValue.ToString();  
     DataRow dataRow = null;  
     foreach (DataRow row in Assignments.Rows)  
     {  
       if (row["ID"].ToString() == id)  
         dataRow = row;  
     }  

     PopulateAssignmentDetail(dataRow);  

  }  
  catch (Exception ex)  
  {  

  }  
}  

protected void PopulateAssignmentDetail(DataRow datarow)  
{  
  // just some code to populate the tabs.  
}  

protected void AddColumnsToGrid()  
{  
   grdCustomerAssignments.MasterTableView.Columns.Clear();  

  for (int i = 1; i < 7; i++)  
  {  
     DataColumn column = Assignments.Columns[i];  
     GridBoundColumn boundColumn = new GridBoundColumn();  
     boundColumn.HeaderText = column.Caption;  
     boundColumn.DataField = column.ColumnName;  
     grdCustomerAssignments.MasterTableView.Columns.Add(boundColumn);  
  }  
}  

private void GetAssignments()  
{  
if (Assignments == null)  
Assignments = new DataTable();  
if (TabTitles == null)  
TabTitles = new Dictionary<string, IList<int>>();  
try  
{  
Assignments.Columns.Add(new DataColumn("ID"));  
for (int i = 0; i < 50; i++)  
{  
Assignments.Columns.Add(new DataColumn("Column" + i.ToString()));  
}  
int columnIndex = 0;  
int tabIndex = 0;  
foreach (DataColumn column in Assignments.Columns)  
{  
if (columnIndex > 5)  
{  
string fieldCategory = "tab" + tabIndex.ToString();  
if (tabIndex == 4)  
tabIndex = 0;  
else  
tabIndex++;  
if (!TabTitles.ContainsKey(fieldCategory))  
{  
IList<int> tmp = new List<int>();  
tmp.Add(columnIndex);  
TabTitles.Add(fieldCategory, tmp);  
}  
else  
TabTitles[fieldCategory].Add(columnIndex);  
}  
columnIndex++;  
}  
for (int j = 0; j < 50; j++)  
{  
DataRow row = Assignments.NewRow();  
foreach (DataColumn column in Assignments.Columns)  
{  
row[column.ColumnName] = column.ColumnName + "Row" + j.ToString();  
}  
Assignments.Rows.Add(row);  
}  
Assignments.AcceptChanges();  
Session["Assignments"] = Assignments;  
}  
catch (Exception ex)  
{  

}  
}

Answer 1

检查完代码后，我注意到你在init.IsPostBack时生成了网格列。我从以前的支持与Telerik的沟通中知道，当你在网页上静态使用网格时，你应该在PageLoPostBack上构建列的页面！Page.IsPostBack-他们指导我帮助主题，在在线帮助中搜索它。

另外，如果我记得很清楚，我在发行说明中读到虚拟滚动和选定项目存在一些问题。它应该在最新的Q3 2009 SP2版本中修复。

迪克

Answer 2

（抱歉，我无法帮助，但是）为什么不发布到telerik forums或创建support ticket？通常你会在24小时内得到答案。

Answer 3

这是一个Button代码此代码可以帮助您删除多个记录，您在RadGrid中选择了哪个复选框。

 protected void Button3_Click(object sender, EventArgs e)
            {
                Area_Master Area;
                int i;


            foreach (GridDataItem item in Grd_Area.Items)//loops through each grid row
            {
                CheckBox chkBx = (CheckBox)item.FindControl("chkArea");
                if (chkBx.Checked)
                {
                    i =  Convert.ToInt32(item.Cells[3].Text); //accessing cell using its ColumnUniqueName
                    var query = from obj in cnx.Area_Master where obj.PKAreaID == i select obj;
                    Area = query.FirstOrDefault();
                    cnx.DeleteObject(Area);
                    cnx.SaveChanges();
                }
            }

        }

即使AllowMultiRowSelection设置为false，Telerik RadGrid也会选择多行

3 个答案: