自动填充固定行数的 GridView

<% @ Page Language = " C# " %>

<! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "
  " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< script runat = " server " >
   //  计算数据，这里可以适当修改从数据库中获取
  ICollection CreateDataSource()
   ... {
    System.Data.DataTable dt = new System.Data.DataTable();
    System.Data.DataRow dr;
    dt.Columns.Add(new System.Data.DataColumn("学生班级", typeof(System.String)));
    dt.Columns.Add(new System.Data.DataColumn("学生姓名", typeof(System.String)));
    dt.Columns.Add(new System.Data.DataColumn("语文", typeof(System.Decimal)));
    dt.Columns.Add(new System.Data.DataColumn("数学", typeof(System.Decimal)));
    dt.Columns.Add(new System.Data.DataColumn("英语", typeof(System.Decimal)));
    dt.Columns.Add(new System.Data.DataColumn("计算机", typeof(System.Decimal)));

    for (int i = 0; i < 8; i++)
    ...{
      System.Random rd = new System.Random(Environment.TickCount * i); ;
      dr = dt.NewRow();
      dr[0] = "班级" + i.ToString();
      dr[1] =  i.ToString();
      dr[2] = System.Math.Round(rd.NextDouble() * 100, 2);
      dr[3] = System.Math.Round(rd.NextDouble() * 100, 2);
      dr[4] = System.Math.Round(rd.NextDouble() * 100, 2);
      dr[5] = System.Math.Round(rd.NextDouble() * 100, 2);
      dt.Rows.Add(dr);
    }
    System.Data.DataView dv = new System.Data.DataView(dt);
    return dv;
  }

   //  设置每页显示的行数  
   int  TotalRowCount  =   12 ;
   //  自动填充的行数
   int  numCount  =   0 ;
   protected   void  Page_Load( object  sender, EventArgs e)
   ... {
    if (!Page.IsPostBack)
    ...{
        GridView1.DataSource = CreateDataSource();
      GridView1.DataBind();
    }
  }

   protected   void  GridView1_RowDataBound( object  sender, GridViewRowEventArgs e)
   ... {
    if (e.Row.RowType == DataControlRowType.DataRow)
    ...{
      // 计算自动填充的行数
      numCount++;
    }
    if (e.Row.RowType == DataControlRowType.Footer)
    ...{
      // 计算完毕，在此添加缺少的行
      int toLeft = TotalRowCount - numCount;
      int numCols = GridView1.Rows[0].Cells.Count;

      for (int i = 0; i < toLeft; i++)
      ...{
        GridViewRow row = new GridViewRow(-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
        for (int j = 0; j < numCols; j++)
        ...{
          TableCell cell = new TableCell();
          cell.Text = "&nbsp;";
          row.Cells.Add(cell);
        }
        GridView1.Controls[0].Controls.AddAt(numCount + 1 + i, row);
      }
    }
  }  
</ script >

< html xmlns = " http://www.w3.org/1999/xhtml " >
< head id = " Head1 "  runat = " server " >
   < title > 自动填充固定行数的 GridView </ title >
</ head >
< body >
   < form id = " form1 "  runat = " server " >
     < asp:GridView ID = " GridView1 "  runat = " server "  OnRowDataBound = " GridView1_RowDataBound "
      Font - Size = " 12px "  CellPadding = " 3 " >
       < HeaderStyle BackColor = " #EDEDED "   />
       < Columns >
         < asp:TemplateField HeaderText = " 序号 " >
           < ItemTemplate >
             <% #Eval( " 学生姓名 " )  %>
           </ ItemTemplate >
         </ asp:TemplateField >
       </ Columns >
     </ asp:GridView >
   </ form >
</ body >
</ html >
 

< %@ Page Language = " vb " % >

< !DOCTYPE html  PUBLIC   " -//W3C//DTD XHTML 1.0 Transitional//EN "
  " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< script runat = " server " >
     '  计算数据，这里可以适当修改从数据库中获取
     Private   Function CreateDataSource() Function CreateDataSource() As System.Data.DataView
        Dim dt As System.Data.DataTable = New System.Data.DataTable
        Dim dr As System.Data.DataRow
        Dim i As Integer
        dt.Columns.Add(New System.Data.DataColumn("学生班级", GetType(String)))
        dt.Columns.Add(New System.Data.DataColumn("学生姓名", GetType(String)))
        dt.Columns.Add(New System.Data.DataColumn("语文", GetType(String)))
        dt.Columns.Add(New System.Data.DataColumn("数学", GetType(String)))
        dt.Columns.Add(New System.Data.DataColumn("英语", GetType(String)))
        dt.Columns.Add(New System.Data.DataColumn("计算机", GetType(String)))
        For i = 0 To 8
            Dim rd As New System.Random(Environment.TickCount * i)
            dr = dt.NewRow
            dr(0) = "班级" + i.ToString()
            dr(1) = i.ToString()
            dr(2) = System.Math.Round(rd.NextDouble() * 100, 2)
            dr(3) = System.Math.Round(rd.NextDouble() * 100, 2)
            dr(4) = System.Math.Round(rd.NextDouble() * 100, 2)
            dr(5) = System.Math.Round(rd.NextDouble() * 100, 2)
            dt.Rows.Add(dr)
        Next
        Dim dv As System.Data.DataView = New System.Data.DataView(dt)
        Return dv
    End Function

     '  设置每页显示的行数  
     Dim  TotalRowCount  As   Integer   =   12
     '  自动填充的行数
     Dim  numCount  As   Integer   =   0
     Protected   Sub Page_Load() Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        If Not Page.IsPostBack Then
            GridView1.DataSource = CreateDataSource()
            GridView1.DataBind()
        End If
    End Sub

     Protected   Sub GridView1_RowDataBound() Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
        If (e.Row.RowType = DataControlRowType.DataRow) Then
            numCount = numCount + 1
        End If
        If (e.Row.RowType = DataControlRowType.Footer) Then
            Dim toLeft As Integer = TotalRowCount - numCount
            Dim numCols As Integer = GridView1.Rows(0).Cells.Count
            Dim i, j As Integer
            For i = 0 To toLeft
                Dim row As GridViewRow = New GridViewRow(-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal)
                For j = 0 To numCols
                    Dim cell As New TableCell
                    cell.Text = "&nbsp;"
                Next
                GridView1.Controls(0).Controls.AddAt(numCount + 1 + i, row)
            Next
        End If
    End Sub
</ script >

< html xmlns = " http://www.w3.org/1999/xhtml " >
< head id = " Head1 "  runat = " server " >
   < title > 自动填充固定行数的 GridView </ title >
</ head >
< body >
   < form id = " form1 "  runat = " server " >
     < asp:GridView ID = " GridView1 "  runat = " server "  OnRowDataBound = " GridView1_RowDataBound "
      Font - Size = " 12px "  CellPadding = " 3 " >
       < HeaderStyle BackColor = " #EDEDED "   />
       < Columns >
         < asp:TemplateField HeaderText = " 序号 " >
           < ItemTemplate >
             < %#Eval( " 学生姓名 " ) % >
           </ ItemTemplate >
         </ asp:TemplateField >
       </ Columns >
     </ asp:GridView >
   </ form >
</ body >
</ html >