ProgressBar.Step 属性

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

Source:

ProgressBar.cs

获取或设置调用 PerformStep() 方法增加进度栏的当前位置时所根据的数量。

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

public int Step { get; set; }

member this.Step : int with get, set

Public Property Step As Integer

属性值

Int32

每次调用 PerformStep() 方法增加进度栏时所根据的数量。 默认值为 10。

示例

下面的代码示例使用 控件 ProgressBar 来显示文件复制操作的进度。 该示例使用 Minimum 和 Maximum 属性为 ProgressBar 指定等效于要复制的文件数的范围。 代码还将 Step 属性与 方法结合使用 PerformStep ，以在复制文件时递增 的值 ProgressBar 。 此示例要求创建一个名为 ProgressBarpBar1 的控件，该控件是在 中创建的 Form，并且有一个名为 CopyFile (创建的方法，该方法返回一个布尔值，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给 CopyWithProgress 示例中定义的 方法，并且从 中的 Form另一个方法或事件调用 该方法。

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 ] ))
         {
            // 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]))
        {
            // 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

可以使用 Step 属性指定操作中每个已完成任务更改进度栏值的金额。 例如，如果要复制一组文件，则可能需要将 属性的值 Step 设置为 1，将 属性的值 Maximum 设置为要复制的文件总数。 复制每个文件时，可以调用 PerformStep 方法以按 属性的值 Step 递增进度栏。 如果想要更灵活地控制进度栏的值，可以使用 Increment 方法或直接设置 属性的值 Value 。

另请参阅

• PerformStep()
• Value
• Increment(Int32)