数据验证

 下面是使用规则表达式对TextBox进行验证:

 

// 固定电话
private   void  textBox3_Validating( object  sender, System.ComponentModel.CancelEventArgs e)
... {
    
    System.Text.RegularExpressions.Regex regex=new System.Text.RegularExpressions.Regex(@"^d{3,4}-d{7,8}$|^d{7,8}$");
    if(this.textBox3.Text.Trim()!="")
    ...{
        if(regex.IsMatch(this.textBox3.Text))
        ...{
            this.errorProvider1.SetError(this.textBox3,"");
        }
        else
        ...{
            this.errorProvider1.SetError(this.textBox3,"有效格式：xxxx-xxxxxxx或xxxxxxx");
            e.Cancel=true;
        }
    }
    else
    ...{
        this.errorProvider1.SetError(this.textBox3,"");
    }
}