C# 如何限制 MVC 文本框中的字符长度？
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How do I limit the length of characters in a textbox in MVC?
提问by MrM
I would like to limit a textbox to 10 characters in MVC.
我想在 MVC 中将文本框限制为 10 个字符。
<label ID="lbl2" runat="server" Width="20px"></label>
<%=Html.TextBox("polNum") %>
<label ID="lbl1" runat="server" Width="10px"></label>
I know you can set the Max Length property in .net. How do I do that in MVC with a textbox generated this way?
我知道您可以在 .net 中设置 Max Length 属性。我如何在 MVC 中使用以这种方式生成的文本框？
采纳答案by Paul
You need to set some html properties... something like:
您需要设置一些 html 属性...例如：
<%=Html.TextBox("polNum",null, new {maxlength=10}) %>
good luck
祝你好运
回答by Canavar
Use the overload of the TextBox methodwhich is getting Html attributes :
使用获取 Html 属性的 TextBox 方法的重载：
Html.TextBox( "polNum", "value", new { maxlength="10" } );
回答by Tomas Aschan
Do it in plain HTML:
在纯 HTML 中执行此操作：
<%= Html.TextBox("polNum", null, new { @maxlength = "25" }) %>
(The nullparameter is because you don't want a default value...)
（null参数是因为你不想要一个默认值...）
回答by Tomas Aschan
<%=Html.TextBox("polNum", new { maxlength = 10 }) %>
http://msdn.microsoft.com/en-us/library/dd492984.aspx
http://msdn.microsoft.com/en-us/library/dd492984.aspx
HtmlHelper uses reflection to examine the anonymous type. It converts the fields of the type into attributes on the, in this case, TextBox control. The resulting HTML looks like
HtmlHelper 使用反射来检查匿名类型。它将类型的字段转换为属性，在本例中为 TextBox 控件。生成的 HTML 看起来像
<Textbox id="polNum" maxlength =10 />
You can use the anonymous type to add other relevant attributes, such as
您可以使用匿名类型添加其他相关属性，例如
new { @class = "MyCssClass", type = "password", value="HurrDurr",
textmode="multiline" }
回答by Tomas Aschan
Use below html for set max length of TextBox In Html.TextBox second parameter is value for textbox So, you can pass "" or null
使用下面的 html 设置 TextBox 的最大长度在 Html.TextBox 第二个参数是文本框的值所以，你可以传递 "" 或 null
<%=Html.TextBox("polNum", "", new { maxlength = 10 }) %>
回答by Isaac Zahn
@Html.EditorFor(model => model.Telephone, new { htmlAttributes = new { @class = "form-control", @maxlength = "10" } })
@Html.EditorFor(model => model.Telephone, new { htmlAttributes = new { @class = "form-control", @maxlength = "10" } })
Here i use html.Editor (do not use Textboxfor) For and i am use the Telephone number field in my database. i do not want the user to type more than ten numbers for telephone.
在这里，我使用 html.Editor（不要使用 Textboxfor），并且我使用数据库中的电话号码字段。我不希望用户输入超过十个电话号码。
