QueryString to Dictionary<string, string>

public class ModelConvertHelper<T> where T : new() {// 此处一定要加上new()
public static IList<T> ConvertToModel(DataTable dt) {

IList<T> ts = new List<T>();// 定义集合
Type type = typeof(T); // 获得此模型的类型
string tempName = "";
foreach (DataRow dr in dt.Rows) {
T t = new T();
PropertyInfo[] propertys = t.GetType().GetProperties();// 获得此模型的公共属性
foreach (PropertyInfo pi in propertys) {
tempName = pi.Name;
if (dt.Columns.Contains(tempName)) {
if (!pi.CanWrite) continue;
object value = dr[tempName];
if (pi.PropertyType.Name == "String") {
pi.SetValue(t, Convert.ToString(value), null);
} else if (pi.PropertyType.Name == "Boolean") {
pi.SetValue(t, Convert.ToBoolean(value), null);
} else if (value != DBNull.Value) {
pi.SetValue(t, value, null);
}
}
}
ts.Add(t);
}
return ts;
}
}

public static void SetProperties<T>(this T source, HttpContext context)
{

var properties = typeof(T).GetProperties(BindingFlags.Instance | BindingFlags.Public);
var values = HttpContext.Current.Request.QueryString;
foreach (var prop in properties) {
if (values.AllKeys.Contains(prop.Name)) {
var propertyValue = values[prop.Name];
//prop.SetValue(source, propertyValue);

if (!prop.PropertyType.IsGenericType) {
prop.SetValue(source, string.IsNullOrEmpty(propertyValue) ? null : Convert.ChangeType(propertyValue, prop.PropertyType));
} else {
Type genericTypeDefinition = prop.PropertyType.GetGenericTypeDefinition();
if (genericTypeDefinition == typeof(Nullable<>)) {
prop.SetValue(source, string.IsNullOrEmpty(propertyValue) ? null : Convert.ChangeType(propertyValue, Nullable.GetUnderlyingType(prop.PropertyType)));
}
}
}
}

}

mode.SetProperties(HttpContext.Current);

Dictionary<string, string> dict = HttpContext.Current.Request.QueryString.Keys.Cast<string>()
.ToDictionary(k => k, v => HttpContext.Current.Request.QueryString[v]);