显示必填字段reg

问题描述

亲爱的所有人，
如何在C#Windows窗体中显示必填字段?有人可以建议我吗?

谢谢和问候，
A.Harisankar.

Dear All,
How to show Mandatory fields in C# windows form? Can any one suggest me?

Thanks and Regards,
A.Harisankar.

推荐答案

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
    if (textBox1.Text == "")
    {
        errorProvider1.SetError(textBox1, "This is a mandatory field");
        e.Cancel = true;
    }
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
    errorProvider1.Clear();
}

通过将e.Cancel设置为true，可以防止表单关闭.
通过使用errorProvider1对象的SetError方法，您将在错误的字段旁显示一个小的错误警告.

您可以根据需要添加尽可能多的错误提供程序.

这非常容易使用并且非常有效.

Valery.

By setting e.Cancel to true you prevent the form from closing.
By using the SetError method of the errorProvider1 object, you will make a little error warning flash next to the field in error.

You can add as many errorproviders as necessary.

This is very simple to use and very effective.

Valery.

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