DataGridPagerStyle.Visible Proprietà

Riferimento

Definizione

Spazio dei nomi:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Importante

Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.

Ottiene o imposta un valore che indica se il pager viene visualizzato nel controllo DataGrid.

public:
 property bool Visible { bool get(); void set(bool value); };

[System.ComponentModel.Bindable(true)]
public bool Visible { get; set; }

public bool Visible { get; set; }

[<System.ComponentModel.Bindable(true)>]
member this.Visible : bool with get, set

member this.Visible : bool with get, set

Public Property Visible As Boolean

Valore della proprietà

Boolean

true per visualizzare il pager; in caso contrario, false. Il valore predefinito è true.

Attributi: BindableAttribute

Esempio

Nell'esempio di codice seguente viene illustrato come utilizzare la Visible proprietà per visualizzare e nascondere l'elemento pager nel DataGrid controllo .

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    ICollection CreateDataSource() 
    {
        DataTable dt = new DataTable();
        DataRow dr;
 
        dt.Columns.Add(new 
            DataColumn("IntegerValue", typeof(Int32)));
        dt.Columns.Add(new 
            DataColumn("StringValue", typeof(string)));
        dt.Columns.Add(new 
            DataColumn("DateTimeValue", typeof(string)));
        dt.Columns.Add(new 
            DataColumn("BoolValue", typeof(bool)));

        for (int i = 0; i < 100; i++) 
        {
            dr = dt.NewRow();
 
            dr[0] = i;
            dr[1] = "Item " + i.ToString();
            dr[2] = DateTime.Now.ToShortDateString();
            dr[3] = (i % 2 != 0) ? true : false;
  
            dt.Rows.Add(dr);
        }

        DataView dv = new DataView(dt);
        return dv;
    }

    void Page_Load(Object sender, EventArgs e) 
    {
        if (chk1.Checked)
            MyDataGrid.PagerStyle.Visible = true;
        else 
            MyDataGrid.PagerStyle.Visible = false;
 
        BindGrid();
    }

    void MyDataGrid_Page(Object sender, 
        DataGridPageChangedEventArgs e) 
    {
        MyDataGrid.CurrentPageIndex = e.NewPageIndex;
        BindGrid();
    }

    void BindGrid() 
    {
        MyDataGrid.DataSource = CreateDataSource();
        MyDataGrid.DataBind();
        ShowStats();
    }
 
    void ShowStats() 
    {
        lblEnabled.Text = "AllowPaging is " + 
            MyDataGrid.AllowPaging;
        lblCurrentIndex.Text = "CurrentPageIndex is " + 
            MyDataGrid.CurrentPageIndex;
        lblPageCount.Text = "PageCount is " + 
            MyDataGrid.PageCount;
        lblPageSize.Text = "PageSize is " + 
            MyDataGrid.PageSize;
    }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Paging with DataGrid</title>
</head>
<body>
   <form id="form1" runat="server">
   <div>

   <h3>Paging with DataGrid</h3>

   <asp:DataGrid id="MyDataGrid" runat="server"
       AllowPaging="True"
       PageSize="10"
       PagerStyle-Mode="NumericPages"
       PagerStyle-HorizontalAlign="Right"
       OnPageIndexChanged="MyDataGrid_Page"
       BorderColor="black"
       BorderWidth="1"
       GridLines="Both"
       CellPadding="3"
       CellSpacing="0"
       Font-Names="Verdana"
       Font-Size="8pt"
       HeaderStyle-BackColor="#aaaadd"
       AlternatingItemStyle-BackColor="#eeeeee"/>
 
   <p>
       <asp:Checkbox id="chk1" runat="server"
           Text="Show pager"
           Font-Names="Verdana"
           Font-Size="8pt"
           AutoPostBack="true"/>
   </p>

   <table style="background-color: #eeeeee" cellpadding="6">
       <tr>
           <td style="white-space: nowrap">
               <asp:Label id="lblEnabled" 
                    runat="server"/><br />
               <asp:Label id="lblCurrentIndex" 
                    runat="server"/><br />
               <asp:Label id="lblPageCount" 
                    runat="server"/><br />
               <asp:Label id="lblPageSize" 
                    runat="server"/><br />
           </td>
       </tr>
   </table>

   </div>
   </form>
</body>
</html>

<%@ Page Language="VB" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
     
    Function CreateDataSource() As ICollection
        Dim dt As New DataTable()
        Dim dr As DataRow
        
        dt.Columns.Add( _
            New DataColumn("IntegerValue", GetType(Int32)))
        dt.Columns.Add( _
            New DataColumn("StringValue", GetType(String)))
        dt.Columns.Add( _
            New DataColumn("DateTimeValue", GetType(String)))
        dt.Columns.Add( _
            New DataColumn("BoolValue", GetType(Boolean)))
        
        Dim i As Integer
        For i = 0 To 99
            dr = dt.NewRow()
            
            dr(0) = i
            dr(1) = "Item " & i.ToString()
            dr(2) = DateTime.Now.ToShortDateString()
            If i Mod 2 <> 0 Then
                dr(3) = True
            Else
                dr(3) = False
            End If
            
            dt.Rows.Add(dr)
        Next i
        
        Dim dv As New DataView(dt)
        Return dv
    End Function 'CreateDataSource

    Sub Page_Load(ByVal sender As Object, _
        ByVal e As EventArgs)

        If chk1.Checked Then
            MyDataGrid.PagerStyle.Visible = True
        Else
            MyDataGrid.PagerStyle.Visible = False
        End If
        BindGrid()
    End Sub 'Page_Load

    Sub MyDataGrid_Page(ByVal sender As Object, _
        ByVal e As DataGridPageChangedEventArgs)

        MyDataGrid.CurrentPageIndex = e.NewPageIndex
        BindGrid()
    End Sub 'MyDataGrid_Page

    Sub BindGrid()
        MyDataGrid.DataSource = CreateDataSource()
        MyDataGrid.DataBind()
        ShowStats()
    End Sub 'BindGrid

    Sub ShowStats()
        lblEnabled.Text = "AllowPaging is " _
            & MyDataGrid.AllowPaging
        lblCurrentIndex.Text = "CurrentPageIndex is " _
            & MyDataGrid.CurrentPageIndex
        lblPageCount.Text = "PageCount is " _
            & MyDataGrid.PageCount
        lblPageSize.Text = "PageSize is " _
            & MyDataGrid.PageSize
    End Sub 'ShowStats

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Paging with DataGrid</title>
</head>
<body>
   <form id="form1" runat="server">
   <div>

   <h3>Paging with DataGrid</h3>
 
      <asp:DataGrid id="MyDataGrid" runat="server"
          AllowPaging="True"
          PageSize="10"
          PagerStyle-Mode="NumericPages"
          PagerStyle-HorizontalAlign="Right"
          OnPageIndexChanged="MyDataGrid_Page"
          BorderColor="black"
          BorderWidth="1"
          GridLines="Both"
          CellPadding="3"
          CellSpacing="0"
          Font-Names="Verdana"
          Font-Size="8pt"
          HeaderStyle-BackColor="#aaaadd"
          AlternatingItemStyle-BackColor="#eeeeee" />
 
      <p>
          <asp:Checkbox id="chk1" runat="server"
              Text="Show pager"
              Font-Names="Verdana"
              Font-Size="8pt"
              AutoPostBack="true" />
      </p>
 
      <table style="background-color: #eeeeee" cellpadding="6">
          <tr>
              <td style="white-space: nowrap">
                  <asp:Label id="lblEnabled" 
                       runat="server"/><br />
                  <asp:Label id="lblCurrentIndex" 
                       runat="server"/><br />
                  <asp:Label id="lblPageCount" 
                       runat="server"/><br />
                  <asp:Label id="lblPageSize" 
                       runat="server"/><br />
              </td>
          </tr>
      </table>

   </div>
   </form>
</body>
</html>

Commenti

Utilizzare la Visible proprietà per specificare se il cercapersone viene visualizzato nel DataGrid controllo .

Si applica a

Vedi anche

DataGrid

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