在过去,按钮点击事件,我已经验证不使用RequiredFieldValidators。不过,我想我会了解他们并加以实施。
我的老办法:
protected void btnSubmit_Click(object sender, EventArgs e)
{
if (txtSubject.Text.Equals("") || txtEmail.Text.Equals("") || txtComments.Text.Equals(""))
{
lblMessage.Text = "Please check all fields have been entered.";
}
//else if ...further validation statements e.g. check lengths
}
然而,使用RequiredFieldValidators具有相同的例子,难道我纠正说,我不必再检查if (txtSubject.Text.Equals("") || txtEmail.Text.Equals("") || txtComments.Text.Equals(""))
像下面或者是很好的做法,这样做呢?
protected void btnSubmit_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
//...further validation statements e.g. check lengths
try
{
SendMail();
}
catch (Exception)
{
}
}
}
如果我还应该包括行,它应该在的,如果(Page.IsValid)的开始,对不对?
HTML代码:
<p>Contact Form</p>
<p>
Your name:
<asp:RequiredFieldValidator ID="rfvName" runat="server" ErrorMessage="*"
ControlToValidate="txtName" ValidationGroup="save" /><br />
<asp:TextBox ID="txtName" runat="server" Width="250px" /><br />
Your email address:
<asp:RequiredFieldValidator ID="rfvEmail" runat="server" ErrorMessage="*"
ControlToValidate="txtEmail" ValidationGroup="save" /><br />
<asp:TextBox ID="txtEmail" runat="server" Width="250px" />
<asp:RegularExpressionValidator runat="server" ID="rfvEmail2"
SetFocusOnError="true" Text="Example: email@gmail.com" ControlToValidate="txtEmail"
ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" Display="Dynamic"
ValidationGroup="save" /><br />
Subject:
<asp:RequiredFieldValidator ID="rfvSubject" runat="server" ErrorMessage="*"
ControlToValidate="txtSubject" ValidationGroup="save" /><br />
<asp:TextBox ID="txtSubject" runat="server" Width="400px" /><br />
Comments:
<asp:RequiredFieldValidator ID="rfvComments" runat="server" ErrorMessage="*"
ControlToValidate="txtComments" ValidationGroup="save" /><br />
<asp:TextBox ID="txtComments" runat="server" TextMode="MultiLine" Rows="10" Width="400px" />
</p>
<p>
<asp:Button ID="btnSubmit" runat="server" Text="Send" OnClick="btnSubmit_Click" ValidationGroup="save" />
</p>
<p>
<asp:Label ID="lblMessage" runat="server" Visible="true" />
</p>
你为什么不执行以下操作?
Page.Validate("save");
if (Page.IsValid)
{
//Continue with your logic
}
else
{
//Display errors, hide controls, etc.
}
这只能激发您的验证组,此外,您可以使用验证摘要显示有关的文本框的正确格式邮件。
还可以显示错误信息,并有显示正确的格式。