/// <summary>
/// 根据过滤器获取查询字符串
/// </summary>
/// <typeparam name="T">Filter</typeparam>
/// <param name="t">过滤器实体</param>
/// <returns></returns>
public static string GetQueryString <T>(this T t) where T : Filter.IFilter
{
string strRet = "";
PropertyInfo[] properties = t.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public);
foreach (PropertyInfo item in properties)
{
FilterAttribute remarkAttribute = (FilterAttribute)item.GetCustomAttribute(typeof(FilterAttribute));
string strValue = item.GetValue(t) + "";
if (remarkAttribute != null && strValue != "")
{
if (remarkAttribute.FilterType == Filter_Type.SqlFilter)
{
strRet += string.Format(" and {0}", strValue);
}
else if (remarkAttribute.FilterType == Filter_Type.QueryIn)
{
strRet += string.Format(" and {0} {1} {2}", item.Name, remarkAttribute.GetOperator(ref strValue), strValue);
}
else
{
strRet += string.Format(" and {0} {1} '{2}'", item.Name, remarkAttribute.GetOperator(ref strValue), strValue);
}
}
}
return(strRet);
}
