如何在c＃windows Application中验证多个文本框？

问题描述：

我的注册表单中有 12个文本框，其中我想仅验证7个文本框。为此，我尝试了这段代码。

I have 12 textboxes in my registration form out of which i want to validate only 7 textboxes. for this i have tried this code.

public void ValidateFields()
        {

            var controls = new[] { txt_PartyName, txt_ContactPerson, txt_mobile1, txt_add, txt_city, txt_state, txt_PinCode };
            foreach (var control in controls.Where(e => String.IsNullOrWhiteSpace(e.Text)))
            {
                errorProvider1.SetError(control, "Please fill the required field");
            }
        }

但是此代码无法按预期工作。我在保存按钮点击事件上调用了此功能，但效果不佳。如果实际上我把所有字段留空了，那么它也会将数据保存到数据库，即不需要。

因此，PLZ为我提供了解决此问题的帮助。

提前致谢

But this code doesn't work as expected. I have call this function on my Save button click event but it is not working well. If actually i left all the field blank then also it saves data to the database i.e not required.
So plz provide me assistance to resolve this issue.
Thanks in advance

答

将public void更改为public boolean，检测到错误后返回false，如果一直返回true则返回true。

根据您的验证结果保存。

如果（ValidateFields）{

//保存到数据库

}

验证功能的新版本如果需要验证：

Change public void to public boolean, after the error is detected return false, if it goes all the way through return true.

Save depending on your validation result.

If (ValidateFields) {
// save to database
}

New version for validate function only IF ALL NEED TO VALIDATED:

public void ValidateFields()
        {

            var controls = new[] { txt_PartyName, txt_ContactPerson, txt_mobile1, txt_add, txt_city, txt_state, txt_PinCode };

boolean isValid = true;
            foreach (var control in controls.Where(e => String.IsNullOrWhiteSpace(e.Text)))
            {
                errorProvider1.SetError(control, "Please fill the required field");
isValid = false;
            }

return isValid;
        }

如果有帮助，请带是时候接受解决方案，以便其他人可以找到它。谢谢。

If this helps, please take time to accept the solution so others may find it. Thank you.

将所有必需的文本框放在GroupBox中。

然后验证如下。

Put all required Textboxes in a GroupBox.

Then validate as below.

private void button1_Click(object sender, EventArgs e)
        {
            foreach (Control control in groupBox1.Controls)
            {
                string controlType = control.GetType().ToString();
                if (controlType == "System.Windows.Forms.TextBox")
                {
                    TextBox txtBox = (TextBox)control;
                    if (string.IsNullOrEmpty(txtBox.Text))
                    {
                        MessageBox.Show(txtBox.Name+ " Can not be empty");
                    }
                }

            }
        }

看到这个 [ ^ ]

如何在c＃windows Application中验证多个文本框？

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