關鍵功能不起作用c＃

Question

我的代碼沒有問題，因爲我可以看到它是一個突破遊戲，但爲了測試目的，我需要能夠用鍵http://pastebin.com/fJWk1ifH手動向上，向下，向左或向右移動

txtBox.KeyDown += new System.Windows.Forms.KeyEventHandler(txtBox_KeyDown); //initialisation for key presson on textbox 

private void txtBox_KeyDown(object sender, KeyEventArgs e) 
{ 
    if (e.KeyCode == Keys.Up) 
    { 
     xChange = 0; 
     yChange = -(trackbarSpeed.Value); 
    } 

    if (e.KeyCode == Keys.Down) 
    { 
     xChange = 0; 
     yChange = (trackbarSpeed.Value); 
    } 

    if (e.KeyCode == Keys.Left) 
    { 
     yChange = 0; 
     xChange = -(trackbarSpeed.Value); 
    } 

    if (e.KeyCode == Keys.Right) 
    { 
     yChange = 0; 
     xChange = (trackbarSpeed.Value); 
    } 
} 

Answer 1

你可以窗體的「的KeyPreview」屬性設置爲true，或作爲這裏建議Key Events: ProcessCmdKey

後者是更好的方式重寫給ProcessCmdKey（）方法。