共用方式為

DataPagerCommandEventArgs.Item 屬性

  • 參考

定義

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

取得 DataPagerFieldItem 物件，這個物件包含 DataPagerField 物件和 DataPagerField 物件的容器 DataPager 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

DataPagerFieldItem 物件，包含 DataPagerField 物件和 DataPagerField 物件的容器 DataPager 物件。

範例

下列範例示範如何使用 Item 屬性來擷取 TextBox 物件中包含的 TemplatePagerField 控件。 此程式代碼範例是提供給 類別之較大範例的 DataPagerCommandEventArgs 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物件包含在此屬性所傳回的物件中DataPagerFieldItem，包含已按下的按鈕。 或者，您可以使用 PagerField 屬性來擷取 DataPagerField 物件。

適用於

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