ProgressBar.Minimum 属性

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

获取或设置控件范围的最小值。

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

public int Minimum { get; set; }

member this.Minimum : int with get, set

Public Property Minimum As Integer

属性值

Int32

范围的最小值。 默认值为 0。

例外

ArgumentException

为该属性指定的值小于 0。

示例

下面的代码示例使用 ProgressBar 控件显示文件复制操作的进度。 该示例使用 Minimum 和 Maximum 属性为等效于要复制的文件数指定范围 ProgressBar 。 该代码还使用 Step 具有方法的属性 PerformStep 来递增复制文件时的值 ProgressBar 。 此示例要求你创建pBar1一个名为在一Form个中创建的控件，并且有一个ProgressBar称为CopyFile (创建的方法，该方法返回一个布尔值，该值指示文件复制操作已成功完成，) 执行文件复制操作。 该代码还要求创建包含要复制的文件的字符串数组，并将其传递到 CopyWithProgress 示例中定义的方法，并且该方法是从该示例中的另一个方法或事件调用的 Form。

private:
   void CopyWithProgress( array<String^>^filenames )
   {
      // Display the ProgressBar control.
      pBar1->Visible = true;

      // Set Minimum to 1 to represent the first file being copied.
      pBar1->Minimum = 1;

      // Set Maximum to the total number of files to copy.
      pBar1->Maximum = filenames->Length;

      // Set the initial value of the ProgressBar.
      pBar1->Value = 1;

      // Set the Step property to a value of 1 to represent each file being copied.
      pBar1->Step = 1;

      // Loop through all files to copy.
      for ( int x = 1; x <= filenames->Length; x++ )
      {
         // Copy the file and increment the ProgressBar if successful.
         if ( CopyFile( filenames[ x - 1 ] ) == true )
         {
            // Perform the increment on the ProgressBar.
            pBar1->PerformStep();
         }
      }
   }

private void CopyWithProgress(string[] filenames)
{
    // Display the ProgressBar control.
    pBar1.Visible = true;
    // Set Minimum to 1 to represent the first file being copied.
    pBar1.Minimum = 1;
    // Set Maximum to the total number of files to copy.
    pBar1.Maximum = filenames.Length;
    // Set the initial value of the ProgressBar.
    pBar1.Value = 1;
    // Set the Step property to a value of 1 to represent each file being copied.
    pBar1.Step = 1;
    
    // Loop through all files to copy.
    for (int x = 1; x <= filenames.Length; x++)
    {
        // Copy the file and increment the ProgressBar if successful.
        if(CopyFile(filenames[x-1]) == true)
        {
            // Perform the increment on the ProgressBar.
            pBar1.PerformStep();
        }
    }
}

Private Sub CopyWithProgress(ByVal ParamArray filenames As String())
    ' Display the ProgressBar control.
    pBar1.Visible = True
    ' Set Minimum to 1 to represent the first file being copied.
    pBar1.Minimum = 1
    ' Set Maximum to the total number of files to copy.
    pBar1.Maximum = filenames.Length
    ' Set the initial value of the ProgressBar.
    pBar1.Value = 1
    ' Set the Step property to a value of 1 to represent each file being copied.
    pBar1.Step = 1

    ' Loop through all files to copy.
    Dim x As Integer
    for x = 1 To filenames.Length - 1
        ' Copy the file and increment the ProgressBar if successful.
        If CopyFile(filenames(x - 1)) = True Then
            ' Perform the increment on the ProgressBar.
            pBar1.PerformStep()
        End If
    Next x
End Sub

注解

此属性指定属性的 Value 下限。 更改属性的值 Minimum 时，将 ProgressBar 重新绘制控件以反映控件的新范围。 当属性的值等于属性的值ValueMinimum时，进度栏为空。 若要更改进度栏的值， Step 请将属性与方法一起使用 PerformStep ，使用 Increment 该方法或直接设置属性的值 Value 。

另请参阅

• Maximum
• Value