sqlexception無法插入重複密鑰行

Question

試圖更改我的SQL語句以更改創建用戶名的格式。我正在創建虛擬數據以便在網頁上進行測試，所以我只需要多個用戶。我想爲用戶更改名稱目前是student{integer}@email.com，我想改名字student{integer}

錯誤

SqlException: Cannot insert duplicate key row in object 'dbo.Users' with unique index 'UX_Users'. The duplicate key value is (1, student0@email.com). The statement has been terminated.

SQL語句

string basestring = "student{0}@email.com"; 
string userName = "Student{0}"; 

using (Database dc = new Database()) 
{ 
    dc.Connection.Open(); 
    for (int i = 0; i < 400; i++) 
    { 
     string email = string.Format(basestring,i); 
     string sName = string.Format(userName, i); 
     User u = new User(){ Name = sName, UserName = email, InstitutionUniqueID = email, Email = email, CreationDate=DateTime.Now, InstitutionsID=1, GUID= Guid.NewGuid() }; 
     dc.Users.InsertOnSubmit(u); 
    } 
    dc.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict); 
} 

這是我我得到錯誤：

dc.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict); 

我正在使用linqpad進行測試。

Answer 1

你的代碼改成這樣：

string basestring = "student{0}@email.com"; 
string userName = "Student{0}"; 

using (Database dc = new Database()) 
{ 

    for (int i = 0; i < 400; i++) 
    { 
     dc.Connection.Open(); 
     string email = string.Format(basestring,i); 
     string sName = string.Format(userName, i); 
     User u = new User(){ Name = sName, UserName = email, InstitutionUniqueID = email, Email = email, CreationDate=DateTime.Now, InstitutionsID=1, GUID= Guid.NewGuid() }; 
     dc.Users.InsertOnSubmit(u); 
     dc.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict); 
     dc.Connection.Close(); 
    } 

} 

您只需將您提交更改你的循環內

問候