public T GetUrlParameterValue <T>(string parameterName)
{
object v;
if (RouteHelper.TryGetRouteValueOfCurrentRoute(parameterName, out v) && v != null)
{
return(DataConvertor.GetValue <T>(v, parameterName, null));
}
return(default(T));
}
/// <summary>
/// 解析View的非强类型Model上的属性
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="model"></param>
/// <param name="propertyName"></param>
/// <returns></returns>
public T ParseModel <T>(object model, string propertyName)
{
object v = null;
try
{
v = DataBinder.Eval(model, propertyName);
}
catch
{
return(default(T));
}
return(DataConvertor.GetValue <T>(v, propertyName, null));
}
public static T GetPropertyValue <T>(object obj, string propertyName)
{
object v = null;
try
{
v = DataBinder.Eval(obj, propertyName);
}
catch
{
return(default(T));
}
return(DataConvertor.GetValue <T>(v, propertyName, null));
}
public C ExecuteFirstColumn <T, C>()
where C : ICollection <T>, new()
{
C list = new C();
using (DbDataReader reader = ExecuteDataReader())
{
while (reader.Read())
{
list.Add(DataConvertor.GetValue <T>(DataMapper.ConvertIfEnum(reader[0], typeof(T)), null, null));
}
reader.Close();
}
return(list);
}
/// <summary>
/// 通过QueryString的key获取相应的value，并转换成所需的类型
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public static T ParseQueryStringVal <T>(string key)
{
if (string.IsNullOrWhiteSpace(key))
{
return(default(T));
}
string val = HttpContext.Current.Request.QueryString.Get(key);
if (string.IsNullOrWhiteSpace(val))
{
return(default(T));
}
try
{
return(DataConvertor.GetValue <T>(val, key, null));
}
catch (Exception)
{
return(default(T));
}
}
/// <summary>
/// 执行返回第一行第一列的值，并自动转换为对应的类型，如果是泛型值且为空则会返回null
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public T ExecuteScalar <T>()
{
object v = DataMapperHelper.ConvertIfEnum(ExecuteScalar(), typeof(T));
return(DataConvertor.GetValue <T>(v, null, null));
}
