我有以下代码：
public static bool Update(UserExtendedData data, byte[] image)
{
data.UserId = getUserId_new();
IQueryable<UserExtendedData> entry = m_model.UserExtendedDataSet.Where(x => x.UserId == getUserId_new());
UserExtendedData User = entry.Single();
User.firstName = data.firstName;
User.lastName = data.lastName;
User.phoneNo = data.phoneNo;
User.creditCardNo = data.creditCardNo;
User.dateOfBirth = data.dateOfBirth;
User.UserId = getUserId_new();
if (image != null)
{
User.avatarArt = image;
}
m_model.UserExtendedDataSet.InsertOnSubmit(data);
return true;
}
我已经使用System.Data.Linq;我在Windows 7（x64）上使用asp.net 4.5 我还包括：
<compilation debug="true" targetFramework="4.5">
但我仍然有错误：
does not contain a definition for 'InsertOnSubmit' and no extension method 'InsertOnSubmit' accepting a first argument of type ' could be found (are you missing a using directive or an assembly reference?)
但奇怪的是我没有遇到任何问题：
public static bool Insert(UserExtendedData data, byte[] image)
{
data.UserId = getUserId_new();
if (image != null)
data.avatarArt = image;
m_model.UserExtendedDataSet.Add(data) ;
m_model.SaveChanges();
return true;
}
您有什么想法会导致这个问题吗？我真的很感激任何帮助。