private static string getSelectOptions(QueryItem queryItem, string selectedValue = null)
{
List <SelectListItem> listItems = new List <SelectListItem>();
if (queryItem.QueryPropertyType == QueryPropertyType.Enum)
{
listItems = SelectListHelper.GetEnumSelectListItems(queryItem.EntityType, selectedValue);
}
else
{
MethodInfo method = typeof(SelectListHelper).GetMethod("GetSelectListItems");
method = method.MakeGenericMethod(queryItem.EntityType);
listItems = method.Invoke(null, new object[] { queryItem.ValueProperty, queryItem.TextProperty, selectedValue, null, null }) as List <SelectListItem>;
}
StringBuilder sb = new StringBuilder();
foreach (var item in listItems)
{
string s = string.Format("<option value=\"{0}\"{1}>{2}</option>", item.Value, item.Selected ? "selected=\"selected\"" : "", item.Text);
sb.Append(s);
}
return(sb.ToString());
}
//构造函数 关联查询属性
public QueryItem(Type modelType, PropertyInfo propertyInfo, AssociatedQueryAttribute aqa)
{
bool hasSpecifiedValue = !(aqa.AssociatedPropertyName == null && aqa.DisplayName == null && aqa.TextPropertyName == null && aqa.ValuePropertyName == null);
//QueryPropertyType
this.QueryPropertyType = aqa.QueryPropertyType;
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// aqa: QueryPropertyType AssociatedPropertyName DisplayName ValuePropertyName TextPropertyName
// 无标签 Select null null null null
// 有标签 Select null 指定 Clas.College.University.Id Clas.College.University.Name
// 有标签 指定（非Select） Clas.College.University.Name 指定 null null
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// QueryItem: QueryPropertyType EntityType PropertyName DisplayName ValueProperty TextProperty
// 无标签 Select Clas Clas.Id 获取 Id Name
// 有标签 Select University Clas.College.University.Id 指定 Id Name
// 有标签 指定（非Select） University Clas.College.University.Name 指定 null null
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//有[AssociatedQuery]标识，或者有[AssociatedQuery]标识且不带参数
if (!hasSpecifiedValue)
{
if (Config.AssociatedQueryAttributeAddedOnForeignKey)
{
PropertyInfo nvProperty = getNavigationPropertyByForeignKeyName(modelType, propertyInfo.Name);
if (nvProperty == null)
{
throw new Exception("查询对话框异常：" + modelType.Name + "类中未找到与" + propertyInfo.Name + "属性相匹配的导航属性");
}
this.EntityType = nvProperty.PropertyType;
this.PropertyName = nvProperty.Name;
}
else
{
this.EntityType = propertyInfo.PropertyType;
PropertyInfo fkProperty = getForeignKeyPropertyByNavigationPropertyTypeName(modelType, this.EntityType.Name);
if (fkProperty == null)
{
throw new Exception("查询对话框异常：" + modelType.Name + "类中未找到与" + propertyInfo.Name + "属性相匹配的外键属性");
}
this.PropertyName = propertyInfo.Name;
}
this.DisplayName = getPropertyDisplayName(propertyInfo);
this.ValueProperty = SelectListHelper.GetSelectListValuePropertyInfo(this.EntityType);
this.TextProperty = SelectListHelper.GetSelectListTextPropertyInfo(this.EntityType);
this.PropertyName += "." + this.ValueProperty.Name;
}
//有[AssociatedQuery]标识且带参数 Select
else if (this.QueryPropertyType == QueryPropertyType.Select)
{
Type type = modelType;
this.ValueProperty = ReflectionHelper.GetProperty(ref type, aqa.ValuePropertyName);
type = modelType;
this.TextProperty = ReflectionHelper.GetProperty(ref type, aqa.TextPropertyName);
this.EntityType = type;
this.PropertyName = aqa.ValuePropertyName;
this.DisplayName = aqa.DisplayName;
}
//有标签 非Select
else
{
Type type = modelType;
ReflectionHelper.GetProperty(ref type, aqa.AssociatedPropertyName);
this.EntityType = type;
this.PropertyName = aqa.AssociatedPropertyName;
this.DisplayName = aqa.DisplayName;
}
}