Asp.net mvc 在asp net mvc中创建自定义帮助器的更好方法
我只是在asp net mvc 3中编写了一个自定义mvc帮助程序,它可以正常工作。。但它看起来并不那么好:Asp.net mvc 在asp net mvc中创建自定义帮助器的更好方法,asp.net-mvc,helper,Asp.net Mvc,Helper,我只是在asp net mvc 3中编写了一个自定义mvc帮助程序,它可以正常工作。。但它看起来并不那么好: public static MvcHtmlString BsCheckBox<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression) { string fieldName = Expressi
public static MvcHtmlString BsCheckBox<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression)
{
string fieldName = ExpressionHelper.GetExpressionText(expression);
ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, html.ViewData);
return MvcHtmlString.Create(
"<input type=\"checkbox\" name=\"" + fieldName+ "_cb\" " + (metadata.Model.ToString() == "S"
? "checked='checked'"
: "") + "/>" +
"<input type=\"hidden\" name=\"" + fieldName + "\" value=\"" + metadata.Model.ToString() + "\" />"
);
}
使用标记生成器:
string campo = ExpressionHelper.GetExpressionText(expression);
ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, html.ViewData);
TagBuilder element1 = new TagBuilder("input");
element1.MergeAttribute("type","checkbox");
element1.MergeAttribute("name", campo + "_cb");
if (metadata.Model.ToString() == "S")
element1.MergeAttribute("checked", "checked");
TagBuilder element2 = new TagBuilder("input");
element2.MergeAttribute("type", "hidden");
element2.MergeAttribute("name", campo);
element2.MergeAttribute("value", metadata.Model.ToString());
return MvcHtmlString.Create(element1.ToString() + element2.ToString());