ProgressBar.Value 属性

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

获取或设置进度栏的当前位置。

public:
 property int Value { int get(); void set(int value); };

[System.ComponentModel.Bindable(true)]
public int Value { get; set; }

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

Public Property Value As Integer

属性值

Int32

进度栏范围内的位置。 默认值为 0。

属性

BindableAttribute

例外

ArgumentException

指定的值大于 Maximum 属性的值。

- 或 -

指定的值小于 Minimum 属性的值。

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

属性的 Value 最小值和最大值由 Minimum 和 Maximum 属性指定。 此属性使你能够直接递增或递减进度栏的值。 若要对 控件的值 ProgressBar 执行一致的增加， Step 可以将 属性与 方法一起使用 PerformStep 。 若要按不同的量增加进度栏值，请使用 Increment 方法。

另请参阅

• Maximum
• Minimum