共用方式為

DataPagerCommandEventArgs.Item 屬性

定義

命名空間:
System.Web.UI.WebControls
組件:
System.Web.Extensions.dll

取得 DataPagerFieldItem 包含該 DataPagerField 物件及其 DataPagerField 容器 DataPager 物件的物件。

public:
 property System::Web::UI::WebControls::DataPagerFieldItem ^ Item { System::Web::UI::WebControls::DataPagerFieldItem ^ get(); };
public System.Web.UI.WebControls.DataPagerFieldItem Item { get; }
member this.Item : System.Web.UI.WebControls.DataPagerFieldItem
Public ReadOnly Property Item As DataPagerFieldItem

屬性值

DataPagerFieldItem

包含DataPagerFieldItem該物件與DataPagerField該物件容器DataPagerDataPagerField物件的物件。

範例

以下範例說明如何利用該 Item 屬性取得 TextBox 包含在 TemplatePagerField 物件中的控制項。 此程式碼範例是本類別更大範例 DataPagerCommandEventArgs 的一部分。

protected void TemplatePagerField_OnPagerCommand(object sender, DataPagerCommandEventArgs e)
{     
    // Get the new page number 
    TextBox PageNumberTextBox = (TextBox)e.Item.FindControl("PageNumberTextBox");
    int newPageNumber = -1;
    try
    {
      newPageNumber = Convert.ToInt32(PageNumberTextBox.Text.Trim());
    }
    catch (FormatException)
    {
      Message.Text = "Invalid page number.";
      return;
    }
    catch (OverflowException)
    {
      Message.Text = "Invalid page number.";
      return;
    }

    int newIndex = (newPageNumber - 1) * e.Item.Pager.PageSize;
    //Verify if the new index is valid
    if (newIndex >= 0 && newIndex <= e.TotalRowCount)
    {
      //Set the new start index and maximum rows
      e.NewStartRowIndex = newIndex;
      e.NewMaximumRows = e.Item.Pager.MaximumRows;
    }
    else
      Message.Text = "Invalid page number.";
}

Protected Sub TemplatePagerField_OnPagerCommand(ByVal sender As Object, _
  ByVal e As DataPagerCommandEventArgs)
  
  ' Get the new page number 
  Dim PageNumberTextBox As TextBox = _
    CType(e.Item.FindControl("PageNumberTextBox"), TextBox)
  
  Dim newPageNumber As Integer = -1
  Try
    newPageNumber = Convert.ToInt32(PageNumberTextBox.Text.Trim())
  Catch fex As FormatException
    Message.Text = "Invalid page number."
    Return
  Catch oex As OverflowException
    Message.Text = "Invalid page number."
    Return
  End Try
      
  Dim newIndex As Integer = _
    (newPageNumber - 1) * e.Item.Pager.PageSize
  
  'Verify if the new index is valid
  If newIndex >= 0 AndAlso newIndex <= e.TotalRowCount Then
    'Set the new start index and maximum rows
    e.NewStartRowIndex = newIndex
    e.NewMaximumRows = e.Item.Pager.MaximumRows
  Else
    Message.Text = "Invalid page number."
  End If
  
End Sub

備註

DataPagerField這個物件包含DataPagerFieldItem在這個屬性回傳的物件中，包含被點擊的按鈕。 或者，你也可以使用該 PagerField 屬性來取得物件 DataPagerField 。

適用於

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