6

有没有办法让 DataGrid 控件呈现 tbody 和 thead HTML 元素？

4

4 回答 4

9

虽然我喜欢“user186197”的答案，但该博客文章使用反射，但在非完全受信任的托管环境中可能会出现问题。这是我们使用的，没有黑客：

public class THeadDataGrid : System.Web.UI.WebControls.DataGrid
{
    protected override void OnPreRender(EventArgs e)
    {
        this.UseAccessibleHeader = true; //to make sure we render TH, not TD

        Table table = Controls[0] as Table;

        if (table != null && table.Rows.Count > 0)
        {
            table.Rows[0].TableSection = TableRowSection.TableHeader;
            table.Rows[table.Rows.Count - 1].TableSection = TableRowSection.TableFooter;
        }

        base.OnPreRender(e);
    }
}
于 2013-06-19T21:03:59.350 回答
4

It can be done also via javascript. 

function AddTHEAD(tableName)
{
   var table = document.getElementById(tableName); 
   if(table != null) 
   {
    var head = document.createElement("THEAD");
    head.style.display = "table-header-group";
    head.appendChild(table.rows[0]);
    table.insertBefore(head, table.childNodes[0]); 
   }
}

Then you must call this function on body onload like that:

<body onload="javascript: AddTHEAD('DataGridId')">

Source: http://www.codeproject.com/KB/grid/HeaderOnEachPage.aspx

于 2010-09-13T11:24:19.627 回答
0

DataGrid 没有内置的东西来满足您的需求。看看ASP.NET 2.0 CSS Friendly Control Adapters 1.0，它们内置了对 DataView 的支持，但似乎您可以轻松地将这个想法用于 DataGrid。

于 2009-02-18T17:23:33.777 回答
0

是的，看起来数据网格不支持这个开箱即用，所以我不得不创建一个继承自 DataGrid 的类。在 DataGrid 呈现之后，我解析 HTML 并将元素注入正确的位置。

附件是我的课程，供那些想知道如何操作的人使用。这是一种快速而肮脏的方法，因此欢迎我提出更好的想法。


Imports System.IO
Imports System.Text

Public Class TestDataGrid
  Inherits System.Web.UI.WebControls.DataGrid

  Private sTHeadClass As String = String.Empty
  Private sTBodyClass As String = String.Empty
  Private sTFootClass As String = String.Empty

#Region " Properties "

  Public Property THeadClass() As String
    Get
      Return sTHeadClass
    End Get
    Set(ByVal value As String)
      sTHeadClass = value
    End Set
  End Property

  Public Property TBodyClass() As String
    Get
      Return sTBodyClass
    End Get
    Set(ByVal value As String)
      sTBodyClass = value
    End Set
  End Property

  Public Property TFootClass() As String
    Get
      Return sTFootClass
    End Get
    Set(ByVal value As String)
      sTFootClass = value
    End Set
  End Property

#End Region

  Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)

    Dim oMemoryStream As New MemoryStream()
    Dim oStreamWriter As New StreamWriter(oMemoryStream)
    Dim oStreamReader As New StreamReader(oMemoryStream)
    Dim oHtmlTextWriter As New HtmlTextWriter(oStreamWriter)

    MyBase.Render(oHtmlTextWriter)

    oHtmlTextWriter.Flush()

    oMemoryStream.Flush()
    oMemoryStream.Position = 0

    Dim sHtml As String = oStreamReader.ReadToEnd()
    Dim oHtml As New Text.StringBuilder()

    Dim iPastIndex As Integer = 0
    Dim iIndex As Integer = sHtml.IndexOf("<tr>")

    oHtml.Append(sHtml.Substring(iPastIndex, iIndex - iPastIndex))

    iPastIndex = iIndex

    If ShowHeader Then
      WriteElementStart(oHtml, "thead", sTHeadClass)

      'Write Header Row
      iIndex = sHtml.IndexOf("</tr>", iPastIndex) + 5
      oHtml.Append(sHtml.Substring(iPastIndex, iIndex - iPastIndex))
      iPastIndex = iIndex

      oHtml.Append("</thead>")
      WriteElementStart(oHtml, "tbody", sTBodyClass)
    Else
      WriteElementStart(oHtml, "tbody", sTBodyClass)
    End If

    If ShowFooter Then

      'Writer Body Rows
      iIndex = sHtml.LastIndexOf("<tr>")
      oHtml.Append(sHtml.Substring(iPastIndex, iIndex - iPastIndex))
      iPastIndex = iIndex

      WriteElementEnd(oHtml, "tbody")
      WriteElementStart(oHtml, "tfoot", sTFootClass)

      'Write Footer Row
      iIndex = sHtml.LastIndexOf("</table>")
      oHtml.Append(sHtml.Substring(iPastIndex, iIndex - iPastIndex))
      iPastIndex = iIndex

      WriteElementEnd(oHtml, "tfoot")

    Else
      iIndex = sHtml.LastIndexOf("</table>")
      oHtml.Append(sHtml.Substring(iPastIndex, iIndex - iPastIndex))
      iPastIndex = iIndex

      WriteElementEnd(oHtml, "tbody")
    End If

    oHtml.Append(sHtml.Substring(iPastIndex, sHtml.Length - iPastIndex))

    writer.Write(oHtml.ToString())
  End Sub

  Private Sub WriteElementStart(ByVal Builder As StringBuilder, ByVal Tag As String, ByVal CssClass As String)
    If String.IsNullOrEmpty(CssClass) Then
      Builder.AppendFormat("<{0}>", Tag)
    Else
      Builder.AppendFormat("<{0} class='{1}'>", Tag, CssClass)
    End If
  End Sub

  Private Sub WriteElementEnd(ByVal Builder As StringBuilder, ByVal Tag As String)
    Builder.AppendFormat("</{0}>", Tag)
  End Sub

End Class
于 2009-02-18T18:11:19.870 回答