數據庫中已有一個對象異常

Question

我的代碼有什麼問題......我嘗試了幾件事情，但一次又一次地得到相同的錯誤。

任何幫助？ 的代碼是：

SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings[SubDomainName].ToString()); 
conn.Open(); 
string temptable = "CREATE TABLE [dbo].[Tmptablenew]([TicketID] [int] NULL,[TicketDescription][varchar](max) NULL,[TicketAssignedTo] [varchar](100) NULL,[TicketCreatedDate] [datetime] NULL,[TicketStatus][varchar](50),CRMConnectionID [int] NULL,[TicketUpdatedDate] [Datetime] NULL,img [varchar](500) NULL)"; 
SqlCommand cmd = new SqlCommand(temptable, conn); 
cmd.ExecuteNonQuery(); 
SqlCommand cmmd = new SqlCommand("select * from Tickets", conn); 
SqlDataAdapter adapter = new SqlDataAdapter(cmmd); 
DataTable dt1 = new DataTable("dt1"); 
adapter.Fill(dt1); 
cmmd.ExecuteNonQuery(); 

//BulkCopy the data in the DataTable to the temp table 
using (SqlBulkCopy bulk = new SqlBulkCopy(conn)) 
{ 
    bulk.DestinationTableName = "Tmptablenew"; 
    bulk.WriteToServer(result); 
    conn.Close(); 
} 
conn.Open(); 
string mergeSql = "merge into Tickets as Target " + 
        "using Tmptablenew as Source " + 
        "on " + 
        "Target.TicketID= Source.TicketID " + 
        "and Target.CRMConnectionID = Source.CRMConnectionID " + 
        "when not matched then " + 
        "insert (TicketID,TicketDescription,TicketAssignedTo,TicketCreatedDate,TicketStatus,CRMConnectionID,TicketUpdatedDate,img) values (Source.TicketID,Source.TicketDescription,Source.TicketAssignedTo,Source.TicketCreatedDate,Source.TicketStatus,Source.CRMConnectionID,Source.TicketUpdatedDate,Source.img);"; 

string mergesql1 = "Update Tickets SET TicketDescription=S.TicketDescription, TicketAssignedTo = S.TicketAssignedTo, TicketStatus = S.TicketStatus,TicketUpdatedDate = S.TicketUpdatedDate,img = S.img FROM Tickets t JOIN Tmptablenew AS S ON t.TicketID = S.TicketID and T.CRMConnectionID = S.CRMConnectionID"; 
cmd.CommandText = mergeSql; 
cmd.ExecuteNonQuery(); 
cmmd.CommandText = mergesql1; 
cmmd.ExecuteNonQuery(); 
cmd.CommandText = "drop table Tmptablenew"; 
cmd.ExecuteNonQuery(); 
//Clean up the temp table 
conn.Close(); 

Answer 1

你正在創建表Tmptablenew，它看起來像這樣表數據庫alredy存在。

我想，你正在嘗試創建一個臨時表，在這種情況下爲MySQL創建它爲CREATE TEMPORARY TABLE，或者爲MS SQL使用表名#Tmptablenew。在這種情況下，會話關閉時也會自動放棄。

編輯

所以，你必須改變string temptable = "CREATE TEMPORARY TABLE [dbo].[Tmptablenew]([TicketID]...等等，如果你正在使用MySQL的（根據你的問題的標記）。或者如果它是MS SQL（如我懷疑）然後string temptable = "CREATE TABLE [dbo].[#Tmptablenew]([TicketID]...等等（在這種情況下，你應該在你的代碼中將它命名爲#Tmptablenew）。