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    copied!<p>I use the CustomModelMetaDataProvider to achieve this </p> <p>Step 1. Add New CustomModelMetadataProvider class</p> <pre><code>public class CustomModelMetadataProvider : DataAnnotationsModelMetadataProvider { protected override ModelMetadata CreateMetadata( IEnumerable&lt;Attribute&gt; attributes, Type containerType, Func&lt;object&gt; modelAccessor, Type modelType, string propertyName) { ModelMetadata metadata = base.CreateMetadata(attributes, containerType, modelAccessor, modelType, propertyName); //Add MaximumLength to metadata.AdditionalValues collection var stringLengthAttribute = attributes.OfType&lt;StringLengthAttribute&gt;().FirstOrDefault(); if (stringLengthAttribute != null) metadata.AdditionalValues.Add("MaxLength", stringLengthAttribute.MaximumLength); return metadata; } } </code></pre> <p>Step 2. In Global.asax Register the CustomModelMetadataProvider </p> <pre><code>protected void Application_Start() { AreaRegistration.RegisterAllAreas(); RegisterRoutes(RouteTable.Routes); ModelMetadataProviders.Current = new CustomModelMetadataProvider(); } </code></pre> <p>Step 3. In Views/Shared/EditorTemplates Add a partial view called String.ascx</p> <pre><code>&lt;%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %&gt; &lt;%if (!ViewData.ModelMetadata.AdditionalValues.ContainsKey("MaxLength")) { %&gt; &lt;%: Html.TextBox("", ViewData.TemplateInfo.FormattedModelValue, new { @class = "text-box single-line" }) %&gt; &lt;% } else { int maxLength = (int)ViewData.ModelMetadata.AdditionalValues["MaxLength"]; %&gt; &lt;%: Html.TextBox("", ViewData.TemplateInfo.FormattedModelValue, new { @class = "text-box single-line", MaxLength = maxLength })%&gt; &lt;% } %&gt; </code></pre> <p>Done... </p> <p><strong>Edit. The Step 3 can start to get ugly if you want to add more stuff to the textbox. If this is your case you can do the following:</strong></p> <pre><code>&lt;%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %&gt; &lt;% IDictionary&lt;string, object&gt; Attributes = new Dictionary&lt;string, object&gt;(); if (ViewData.ModelMetadata.AdditionalValues.ContainsKey("MaxLength")) { Attributes.Add("MaxLength", (int)ViewData.ModelMetadata.AdditionalValues["MaxLength"]); } if (ViewData.ContainsKey("style")) { Attributes.Add("style", (string)ViewData["style"]); } if (ViewData.ContainsKey("title")) { Attributes.Add("title", (string)ViewData["title"]); } %&gt; &lt;%: Html.TextBox("", ViewData.TemplateInfo.FormattedModelValue, Attributes)%&gt; </code></pre>
 

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