posted @ 2007-03-18 20:34 dn 阅读(80) 评论(0) 编辑
对教材2.6.2、2.6.3、2.6.4部分进行的例题演示，代码如下：
完整例题代码下载：Validating.rar
1
//对控件验证事件的处理
2 private void minValueTextBox_Validating(object sender, System.ComponentModel.CancelEventArgs e)
3
{
4
if(Convert.ToInt32(minValueTextBox.Text) >= Convert.ToInt32(maxValueTextBox.Text))
5
{
6 e.Cancel = true;
7 MessageBox.Show("You must enter a minimum value that is less than the Maximum value");
8
}
9
}
10
11//利用ErrorProvider控件完成验证
12 private void textBox1_Validating(object sender, System.ComponentModel.CancelEventArgs e)
13 {
14 try
15 {
16 int x= Int32.Parse(textBox1.Text);
17 errorProvider1.SetError(textBox1,"");
18 }
19 catch
20 {
21 errorProvider1.SetError(textBox1,"Not a integer value.");
22 }
23 }
//对控件验证事件的处理2
private void minValueTextBox_Validating(object sender, System.ComponentModel.CancelEventArgs e)3
{4
if(Convert.ToInt32(minValueTextBox.Text) >= Convert.ToInt32(maxValueTextBox.Text))5
{6
e.Cancel = true;7
MessageBox.Show("You must enter a minimum value that is less than the Maximum value");8
}9
}10
11
//利用ErrorProvider控件完成验证12
private void textBox1_Validating(object sender, System.ComponentModel.CancelEventArgs e)13
{14
try15
{16
int x= Int32.Parse(textBox1.Text);17
errorProvider1.SetError(textBox1,"");18
}19
catch20
{21
errorProvider1.SetError(textBox1,"Not a integer value.");22
}23
}
1//窗体级别的验证
2 private void btnValidate_Click(object sender, System.EventArgs e)
3 {
4 foreach(System.Windows.Forms.Control aControl in this.Controls)
5 {
6 if(aControl is System.Windows.Forms.TextBox && aControl.Text=="")
7 {
8 aControl.Focus();
9 return;
10 }
11 }
12 MessageBox.Show("通过了验证！");
13
14 }
//窗体级别的验证2
private void btnValidate_Click(object sender, System.EventArgs e)3
{4
foreach(System.Windows.Forms.Control aControl in this.Controls)5
{6
if(aControl is System.Windows.Forms.TextBox && aControl.Text=="")7
{8
aControl.Focus();9
return;10
}11
}12
MessageBox.Show("通过了验证！");13
14
}完整例题代码下载：Validating.rar
posted @ 2007-03-18 20:21 dn 阅读(64) 评论(0) 编辑
对教材2.4.2部分进行的演示，相关代码如下：
完整源代码下载：runtime_control.rar
1private void button1_Click(object sender, System.EventArgs e)
2 {
3 //创建控件实例
4 CheckBox signatureCheckBox = new CheckBox();
5 signatureCheckBox.Name = "myCheckBox";
6 signatureCheckBox.Text = "Signature required";
7 signatureCheckBox.Width = 224;
8 signatureCheckBox.Left = 24;
9 signatureCheckBox.Top = 80;
10
11 //将控件添加到窗体中的GroupBox控件实例中
12 groupBox1.Controls.Add(signatureCheckBox);
13 }
private void button1_Click(object sender, System.EventArgs e)2
{3
//创建控件实例4
CheckBox signatureCheckBox = new CheckBox();5
signatureCheckBox.Name = "myCheckBox";6
signatureCheckBox.Text = "Signature required";7
signatureCheckBox.Width = 224;8
signatureCheckBox.Left = 24;9
signatureCheckBox.Top = 80;10
11
//将控件添加到窗体中的GroupBox控件实例中12
groupBox1.Controls.Add(signatureCheckBox);13
}完整源代码下载：runtime_control.rar
posted @ 2007-03-18 20:14 dn 阅读(74) 评论(0) 编辑