/// <summary>
/// 使用PropertyDescriptor映射(或IDataRowSetter接口,如果对象实IDataRowSetter接口)设置属性值
/// </summary>
/// <param name="des"></param>
/// <param name="propertyname"></param>
/// <param name="propertyvalue"></param>
public static void SetMemberValue(this object des, string membername, object membervalue)
{
if (des == null)
{
return;
}
try
{
if (des is IDataRowSetter)
{
IDataRowSetter s = des as IDataRowSetter;
s.SetFieldValue(membername, membervalue);
return;
}
PropertyDescriptorCollection pdcols = TypeDescriptor.GetProperties(des);
PropertyDescriptor pd = pdcols[membername];
if (pd != null)
{
if (membervalue != null && pd.PropertyType.IsNullableType() && pd.PropertyType.GetTypeIfIsNullable().IsEnum)
{
//防止 从int类型到enum?类型的转换无效错误
object v = Enum.ToObject(pd.PropertyType.GetTypeIfIsNullable(), membervalue);
pd.SetValue(des, v);
}
else
{
pd.SetValue(des, membervalue);
}
}
}
catch (Exception e)
{
throw new UnkownCodeException(ErrorCodes.SetMemberValueError, string.Format(LocalResource.SetMemberValueError, des.GetType().FullName, membername, e.Message));
}
}
public static DataTable StartShema(this IDataRowSetter source)
{
DataTable dt = new DataTable(source.GetType().Name);
dt.ExtendedProperties[templateFieldDataTable.shema_sourceinstance] = source;
dt.ExtendedProperties[templateFieldDataTable.shema_classname] = source.GetType().Name;
return(dt);
}
/// <summary>
/// 设置数据data的字段值为fieldvalue
/// <para>如果data实现接口IDataRowSetter,则调用IDataRowSetter.SetFieldValue</para>
/// </summary>
/// <param name="field"></param>
/// <param name="data">要设置值的数据</param>
/// <param name="fieldvalue">要设置为的字段值</param>
public static void SetModelFieldValue(this IDataFieldModel field, object data, object fieldvalue)
{
if (data is IDataRowSetter)
{
IDataRowSetter s = data as IDataRowSetter;
s.SetFieldValue(field.Name, fieldvalue);
return;
}
PropertyDescriptor pd = DataModelHelper.GetExtendProerty_PropertyDescription(field.InnerExtend);
if (pd != null)
{
pd.SetValue(data, fieldvalue);
}
else
{
throw new ObjectIsNullException(LocalResource.FieldPropertyDescriptor);
}
}
