需求
有一个这样的需求,根据给定的数据源和html模板生成html,强大的All in one code中的代码不能满足需求,所以就有了RepeaterSimulate.
其中涉及:反射、泛型、正则表达式等基础知识。
RepeaterSimulate使用
RepeaterSimulate r = new RepeaterSimulate();
r.ItemTemplate = "<div>#Name#<div><div>#Age#<div>";
List<TestModel> tm = new List<TestModel>() {
new TestModel(){Name="zhangsan",Age=11},new TestModel(){Name="lisi",Age=12},new TestModel(){Name="wangwu",Age=13},new TestModel(){Name="sunliu",Age=31}};string html = r.GenerateHTML<TestModel>(tm);
Console.WriteLine(html);Console.Read();
效果如图:
RepeaterSimulate实现
模拟器中的GenerateHTML方法:
public string GenerateHTML<T>(object obj){StringBuilder sb = new StringBuilder();
IEnumerable<T> enumerable = obj as IEnumerable<T>;
MemberInfo[] myMemberInfo;// Get the type of 'MyClass'.
Type myType = typeof(T);
// Get the information related to all public member's of 'MyClass'.
myMemberInfo = myType.GetMembers();string regexText = "#\\w{1,}#";Match mt = Regex.Match(this.ItemTemplate, regexText);
List<string> results = RegularHelper.GetResult(mt);
foreach (var item in enumerable){string tempStr = this.ItemTemplate;for (int i = 0; i < myMemberInfo.Length; i++){if (myMemberInfo[i].MemberType.ToString() == "Property"){if (results.Contains(myMemberInfo[i].Name))
{object v = myType.InvokeMember(myMemberInfo[i].Name,
BindingFlags.DeclaredOnly |BindingFlags.Public | BindingFlags.NonPublic |BindingFlags.Instance | BindingFlags.GetProperty, null, item, null);tempStr = tempStr.Replace("#" + myMemberInfo[i].Name + "#", v.ToString());}}}sb.Append(tempStr);}return sb.ToString();
}
其中的#\\w{1,}#匹配对象为”#中间为字符,字符数量大于1个#”,这里约定好被绑定的数据源的属性名在两个#之间,当然也可以类似aspx<%#神马的 %>
遍历正则匹配到的属性:
public class RegularHelper{private static List<string> Result {get;set;}public static List<string> GetResult(Match mt){List<string> r = new List<string>();GetMatchValues(mt,r);return r;
}private static void GetMatchValues(Match mt, List<string> r){r.Add(mt.Value.TrimStart('#').TrimEnd('#'));if (mt.NextMatch().Length > 0)
GetMatchValues(mt.NextMatch(),r);}}
上面的GetMatchValues递归遍历出所有匹配的对象。
思考题
支持这种写法#Name.substring(0,12)+”……”#