C# 如何在后面的代码中访问html控件
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How to access html controls in code behind
提问by user3357963
I'm trying to follow this exampleon how to validate credentials. However, it uses asp: controls for the login form.
我正在尝试按照此示例了解如何验证凭据。但是，它使用 asp: 控件作为登录表单。
If I were to use html controls instead so CSS styles can be applied, eg
如果我改用 html 控件，则可以应用 CSS 样式，例如
<div id="login">
<a href="#" id="lclose"></a>
<form action="#" runat="server">
<fieldset>
<div class="frame">
<h4>Login</h4>
<small>Sign in to your account.</small>
<div class="clear"></div>
<input type="text" value="Username" class="input-text autoclear" />
<input type="password" value="Password" class="input-text autoclear"/>
</div>
<div class="separator"></div>
<div>
<input type="submit" value="Sign in" class="input-submit float-right" runat="server" onserverclick="LoginButton_Click"/>
<a href="#" class="float-left">Forgot your password?</a>
</div>
</fieldset>
</form>
</div>
How do I access the Username & Password in code behind similar to?
如何在类似于后面的代码中访问用户名和密码？
protected void LoginButton_Click(object sender, EventArgs e)
{
// Validate the user against the Membership framework user store
if (Membership.ValidateUser(UserName.Text, Password.Text))
{
// Log the user into the site
FormsAuthentication.RedirectFromLoginPage(UserName.Text, RememberMe.Checked);
}
// If we reach here, the user's credentials were invalid
InvalidCredentialsMessage.Visible = true;
}
What is the correct syntax instead of UserName.Text, Password.Text?
什么是正确的语法而不是UserName.Text, Password.Text？
采纳答案by Damith
Add idand runatserver attributes to the input tag (see below)
添加id和runat服务器属性到输入标签（见下文）
<input type="text" value="Username" class="input-text autoclear" id="Username" runat="server"/>
<input type="password" value="Password" class="input-text autoclear" id="Password" runat="server"/>
You also need to change Textto Valuein your code:
您还需要在代码中更改Text为Value：
protected void LoginButton_Click(object sender, EventArgs e)
{
// Validate the user against the Membership framework user store
if (Membership.ValidateUser(Username.Value, Password.Value))
{
// Log the user into the site
FormsAuthentication.RedirectFromLoginPage(UserName.Value, RememberMe.Checked);
}
// If we reach here, the user's credentials were invalid
InvalidCredentialsMessage.Visible = true;
}
You can also add a html checkboxfor RememberMe
您还可checkbox以为RememberMe
<input id="RememberMe" type="checkbox" runat="server" value ="RememberMe"/>
Now you can check the checked states by calling RememberMe.Checked
现在您可以通过调用来检查选中的状态 RememberMe.Checked
回答by cheedep
You can access them from code behind by adding runat="server"on the html elements.
您可以通过添加runat="server"html 元素从后面的代码访问它们。
http://www.w3schools.com/aspnet/aspnet_refhtmlcontrols.asp
http://www.w3schools.com/aspnet/aspnet_refhtmlcontrols.asp
The below link has an example of how you can do this
下面的链接有一个示例，说明如何执行此操作
回答by Matt Varblow
Add runat="server" and id="your_id" and you should have access to them. For example:
添加 runat="server" 和 id="your_id"，您应该可以访问它们。例如：
<input type="text" value="Username" class="input-text autoclear"
runat="server" id="UserName" />
<input type="password" value="Password" class="input-text autoclear"
runat="server" id="Password"/>
Then you can access the values like this:
然后你可以访问这样的值：
Membership.ValidateUser(UserName.Value, Password.Value)
