Question

C#重载与委托不匹配

private void textBox2_KeyPress(object sender, KeyPressEventArgs e)和this.textBox2.TextChanged += new System.EventHandler(this.textBox2_KeyPress);不匹配

Answer 1

参数类型不一致，应该是private void textBox2_KeyPress(object sender, KeyPressEventArgs e) 对应的是KeyPress这个消息，改成private void textBox2_KeyPress(object sender, TextChangedEventArgs e)

Answer 2

private void textBox2_KeyPress(object sender, KeyPressEventArgs e)第二个参数是KeyPressEventArgs类型
TextChanged需要的函数的第二个参数是EventArgs e，肯定不匹配了

Answer 3

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