在cancelAsyncButton 控件的 Click 事件处理程序中,添加取消异步操作的代码。 C# 复制 private void cancelAsyncButton_Click(System.Object sender, System.EventArgs e) { // Cancel the asynchronous operation. this.backgroundWorker1.CancelAsync(); // Disable the Cancel button. ca...
向窗体添加两个Button控件。 重命名第一个Button控件startAsyncButton,并将Text属性设置为Start Async。 重命名第二个Button控件cancelAsyncButton,并将Text属性设置为Cancel Async。 将它的Enabled属性设置为false。 为两个Button控件的Click事件创建一个事件处理程序。 有关详细信息,请参阅如何...
// Get the value from the UpDown control.numberToCompute = (int)numericUpDown1.Value;// Reset the variable for percentage tracking.highestPercentageReached =0;// Start the asynchronous operation.backgroundWorker1.RunWorkerAsync(numberToCompute); }privatevoidcancelAsyncButton_Click(System.Object ...
在檔案的頂端匯入 System.Windows.Forms.Design 命名空間: C# 複製 using System.Windows.Forms.Design; 實作squarePanel 和 circlePanel 控制項的 Click 事件處理常式。這些方法會叫用 CloseDropDown,以結束自訂 UITypeEditor 編輯工作階段。 C# 複製 private void squarePanel_Click(object sender, EventArgs e...
命名空间: System.Windows.Forms 程序集: System.Windows.Forms.dll 表示Windows 按钮控件。C# 复制 public class Button : System.Windows.Forms.ButtonBase, System.Windows.Forms.IButtonControl继承 Object MarshalByRefObject Component Control ButtonBase Button ...
命名空間: System.Windows.Forms 組件: System.Windows.Forms.dll 代表Windows 按鈕控制項。C# 複製 public class Button : System.Windows.Forms.ButtonBase, System.Windows.Forms.IButtonControl繼承 Object MarshalByRefObject Component Control ButtonBase Button 實作 IButtonControl ...
Form { private int numberToCompute = 0; private int highestPercentageReached = 0; private System.Windows.Forms.NumericUpDown numericUpDown1; private System.Windows.Forms.Button startAsyncButton; private System.Windows.Forms.Button cancelAsyncButton; private System.Windows.Forms.ProgressBar progressBar1...
命名空间: System.Windows.Forms 程序集: System.Windows.Forms.dll 表示Windows 按钮控件。C# 复制 public class Button : System.Windows.Forms.ButtonBase, System.Windows.Forms.IButtonControl继承 Object MarshalByRefObject Component Control ButtonBase Button 实现 IButtonControl ...
Implements the basic functionality common to button controls.C# Copy public abstract class ButtonBase : System.Windows.Forms.ControlInheritance Object MarshalByRefObject Component Control ButtonBase Derived System.Windows.Forms.Button System.Windows.Forms.CheckBox System.Windows.Forms.RadioButton ...
If your code is already async then using async/await is fine. Michael Taylor http://www.michaeltaylorp3.net I am just wanting to keep the form "active" so a user can click a cancel button which will stop everything if need be, and also write updates to a text box on the windows...