BaseValidatorDesigner.GetDesignTimeHtml Metode

Definisi

Ruang nama:

System.Web.UI.Design.WebControls

Rakitan:

System.Design.dll

Mendapatkan markup yang digunakan untuk merender kontrol terkait pada waktu desain.

public:
 override System::String ^ GetDesignTimeHtml();

public override string GetDesignTimeHtml();

override this.GetDesignTimeHtml : unit -> string

Public Overrides Function GetDesignTimeHtml () As String

Mengembalikan

String

String yang berisi markup yang digunakan untuk merender BaseValidator pada waktu desain.

Contoh

Contoh kode berikut menunjukkan cara mengambil alih GetDesignTimeHtml metode yang menggambar batas solid di sekitar kontrol terkait pada waktu desain jika nilai BorderStyle properti kontrol diatur ke NotSet bidang atau None .

// Make the full extent of the control more visible in the designer.
// If the border style is None or NotSet, change the border to a 
// solid line. 
public override string GetDesignTimeHtml()
{
    // Get a reference to the control or a copy of the control.
    SimpleCompareValidator myCV = (SimpleCompareValidator)ViewControl;
    string markup = null;

    // Check if the border style should be changed.
    if (myCV.BorderStyle == BorderStyle.NotSet ||
        myCV.BorderStyle == BorderStyle.None)
    {
        // Save the current property setting.
        BorderStyle oldBorderStyle = myCV.BorderStyle;

        // Set the design-time property and catch any exceptions.
        try
        {
            myCV.BorderStyle = BorderStyle.Solid;

            // Call the base method to generate the markup.
            markup = base.GetDesignTimeHtml();
        }
        catch (Exception ex)
        {
            markup = GetErrorDesignTimeHtml(ex);
        }
        finally
        {
            // Restore the property to its original setting.
            myCV.BorderStyle = oldBorderStyle;
        }
    }
    else
    {
        // Call the base method to generate the markup.
        markup = base.GetDesignTimeHtml();
    }

    return markup;
} // GetDesignTimeHtml

' Make the full extent of the control more visible in the designer.
' If the border style is None or NotSet, change the border to a 
' solid line. 
Public Overrides Function GetDesignTimeHtml() As String

    ' Get a reference to the control or a copy of the control.
    Dim myCV As SimpleCompareValidator = _
        CType(ViewControl, SimpleCompareValidator)
    Dim markup As String

    ' Check if the border style should be changed.
    If (myCV.BorderStyle = BorderStyle.NotSet Or _
        myCV.BorderStyle = BorderStyle.None) Then

        ' Save the current property setting.
        Dim oldBorderStyle As BorderStyle = myCV.BorderStyle

        ' Set the design-time property and catch any exceptions.
        Try
            myCV.BorderStyle = BorderStyle.Solid

            ' Call the base method to generate the markup.
            markup = MyBase.GetDesignTimeHtml()

        Catch ex As Exception
            markup = GetErrorDesignTimeHtml(ex)

        Finally
            ' Restore the property to its original setting.
            myCV.BorderStyle = oldBorderStyle
        End Try

    Else
        ' Call the base method to generate the markup.
        markup = MyBase.GetDesignTimeHtml()
    End If

    Return markup
End Function

Keterangan

ErrorMessage Jika properti atau Text kontrol terkait yang berasal dari BaseValidator kelas adalah string kosong (""), atau jika Display properti diatur ke None bidang , GetDesignTimeHtml metode mengatur ErrorMessage properti ke ID kontrol, yang diapit dalam tanda kurung ([]) dan mengatur Display properti ke Static bidang . Kemudian GetDesignTimeHtml memanggil GetDesignTimeHtml metode dasar untuk menghasilkan markup, dan memulihkan properti kontrol ke nilai aslinya, jika perlu.

Lihat juga

• BaseValidator
• ErrorMessage
• Display
• ValidatorDisplay
• GetDesignTimeHtml()