ProgressBar.Increment(Int32) 方法

public:
 void Increment(int value);

public void Increment(int value);

member this.Increment : int -> unit

Public Sub Increment (value As Integer)

参数

例外

示例

下面的代码示例演示如何使用 Increment 方法和 属性在 Tick 发生 时Timer递增 的值ProgressBarValue。 该示例还显示 Value 中的 StatusBarPanel 属性，以提供 的文本表示形式 ProgressBar。 此示例要求有一个名为 ProgressBar 的 progressBar1控件和一个 StatusBar 包含 StatusBarPanel名为 的 statusBarPanel1控件。 time名为 的 Timer必须作为成员添加到窗体中。

private:
   Timer^ time;

   // Call this method from the constructor of the form.
   void InitializeMyTimer()
   {
      // Set the interval for the timer.
      time->Interval = 250;

      // Connect the Tick event of the timer to its event handler.
      time->Tick += gcnew EventHandler( this, &Form1::IncreaseProgressBar );

      // Start the timer.
      time->Start();
   }

   void IncreaseProgressBar( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      // Increment the value of the ProgressBar a value of one each time.
      progressBar1->Increment( 1 );

      // Display the textual value of the ProgressBar in the StatusBar control's first panel.
      statusBarPanel1->Text = String::Concat( progressBar1->Value, "% Completed" );

      // Determine if we have completed by comparing the value of the Value property to the Maximum value.
      if ( progressBar1->Value == progressBar1->Maximum )

      // Stop the timer.
      time->Stop();
   }

private Timer time = new Timer();

// Call this method from the constructor of the form.
private void InitializeMyTimer()
{
   // Set the interval for the timer.
   time.Interval = 250;
   // Connect the Tick event of the timer to its event handler.
   time.Tick += new EventHandler(IncreaseProgressBar);
   // Start the timer.
   time.Start();
}

private void IncreaseProgressBar(object sender, EventArgs e)
{
   // Increment the value of the ProgressBar a value of one each time.
   progressBar1.Increment(1);
   // Display the textual value of the ProgressBar in the StatusBar control's first panel.
   statusBarPanel1.Text = progressBar1.Value.ToString() + "% Completed";
   // Determine if we have completed by comparing the value of the Value property to the Maximum value.
   if (progressBar1.Value == progressBar1.Maximum)
      // Stop the timer.
      time.Stop();
}

Private time As New Timer()

' Call this method from the constructor of the form.
Private Sub InitializeMyTimer()
   ' Set the interval for the timer.
   time.Interval = 250
   ' Connect the Tick event of the timer to its event handler.
   AddHandler time.Tick, AddressOf IncreaseProgressBar
   ' Start the timer.
   time.Start()
End Sub


Private Sub IncreaseProgressBar(ByVal sender As Object, ByVal e As EventArgs)
   ' Increment the value of the ProgressBar a value of one each time.
   ProgressBar1.Increment(1)
   ' Display the textual value of the ProgressBar in the StatusBar control's first panel.
   statusBarPanel1.Text = ProgressBar1.Value.ToString() + "% Completed"
   ' Determine if we have completed by comparing the value of the Value property to the Maximum value.
   If ProgressBar1.Value = ProgressBar1.Maximum Then
      ' Stop the timer.
      time.Stop()
   End If
End Sub

注解

方法 Increment 使你能够按特定量递增进度栏的值。 这种递增进度栏的方法类似于将 属性与 方法一 Step 起使用 PerformStep 。 属性 Value 指定 的 ProgressBar当前位置。 如果在调用 Increment 方法后， Value 属性大于属性的值 Maximum ，则 Value 属性将保持为 属性的值 Maximum 。 如果使用 参数中指定的负值调用Increment方法后，Value属性小于属性的值Minimum，则Value属性将保持为 属性的值Minimum。value

ProgressBar因为样式设置为Marquee显示连续滚动条而不是其 Value的对象，因此不需要调用 Increment ，并且将引发 InvalidOperationException。

另请参阅

• Maximum
• Minimum
• Value
• Step
• PerformStep()