private void xxxxx() //此函数是一个类的成员函数
{
System.Windows.Forms.RichTextBox richTextBoxStateMessage;
//richTextBoxStateMessage 这个临时变量用来获得tabPageConnectMessage中
//的RichTextBox
foreach(System.Windows.Forms.Control control in
tabPageConnectMessage.Controls)
{
if(control is System.Windows.Forms.RichTextBox)
{
richTextBoxStateMessage=
(System.Windows.Forms.RichTextBox) control;
break;
}
}
richTextBoxStateMessage.AppendText("ddddddddddddd");
}
如果这样写的话,理论上讲应该没错啊!
{
System.Windows.Forms.RichTextBox richTextBoxStateMessage;
//richTextBoxStateMessage 这个临时变量用来获得tabPageConnectMessage中
//的RichTextBox
foreach(System.Windows.Forms.Control control in
tabPageConnectMessage.Controls)
{
if(control is System.Windows.Forms.RichTextBox)
{
richTextBoxStateMessage=
(System.Windows.Forms.RichTextBox) control;
break;
}
}
richTextBoxStateMessage.AppendText("ddddddddddddd");
}
如果这样写的话,理论上讲应该没错啊!
System.Windows.Forms.RichTextBox richTextBoxStateMessage=null;
使用时判断
if(richTextBoxStateMessage!=null)
{
richTextBoxStateMessage.AppendText("ddddddddddddd");
}
(System.Windows.Forms.RichTextBox) control;
换成
richTextBoxStateMessage= control as (System.Windows.Forms.RichTextBox);
private void xxxxx() //此函数是一个类的成员函数
{
System.Windows.Forms.RichTextBox richTextBoxStateMessage =
new System.Window.Forms.RichTextBox();
//richTextBoxStateMessage 这个临时变量用来获得tabPageConnectMessage中
//的RichTextBox
foreach(System.Windows.Forms.Control control in
tabPageConnectMessage.Controls)
{
if(control is System.Windows.Forms.RichTextBox)
{
richTextBoxStateMessage=
(System.Windows.Forms.RichTextBox) control;
break;
}
}
}
richTextBoxStateMessage.AppendText("ddddddddddddd");
...........
} 这样的话,如果foreach中能够匹配,就会泄漏初始化的那片资源,但是C#中系统应该自动把他释放掉,这样没问题吧?