MVC htmlhelp类扩展for lambda表达式方式

发布时间：2020-12-13 20:13:43 所属栏目：PHP教程来源：网络整理

导读：public static MvcHtmlString InputTextForTModel,TValue(this HtmlHelperTModel html,ExpressionFuncTModel,TValue expression,object attr=null) { DisplayAttribute disp = null; VilidateAttribute vilidate = null; string name = string.Empty; try { d

public static MvcHtmlString InputTextFor<TModel,TValue>(this HtmlHelper<TModel> html,Expression<Func<TModel,TValue>> expression,object attr=null)
{
DisplayAttribute disp = null;
VilidateAttribute vilidate = null;
string name = string.Empty;
try
{
dynamic exp = expression.Body.GetType().GetProperty("Member").GetValue(expression.Body,null);
var strName = (string)exp.Name;
var p = typeof(TModel).GetProperty(strName);
disp = p.GetCustomAttributes(typeof(DisplayAttribute),false).FirstOrDefault() as DisplayAttribute;
vilidate = p.GetCustomAttributes(typeof(VilidateAttribute),false).FirstOrDefault() as VilidateAttribute;
name = strName;
}
catch (Exception e)
{
}
TagBuilder tag = new TagBuilder("input");
tag.MergeAttribute("type","text");
tag.MergeAttribute("class","form-control");
tag.MergeAttribute("id","i-"+ name);
tag.MergeAttribute("name","n-"+ name);
tag.MergeAttribute("placeholder","请输入" + disp.Name);
//验证
foreach (var item in vilidate.GetInfo())
{
tag.MergeAttribute(item.Key,item.Value);
}
//附加
if(attr!=null)
{
foreach (var item in attr.GetType().GetProperties(Reflection.BindingFlags.Instance | Reflection.BindingFlags.Public))
{
tag.MergeAttribute(item.Name,item.GetValue(attr,null).ToString());
}
}
tag.InnerHtml = disp == null ? "未设置Display" : "";
return new MvcHtmlString(tag.ToString());
}

（编辑：李大同）

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