Question

我有一个c＃.Net 4.5控制台应用程序，我正在尝试将数据从DataTable插入到SQL Server 2008R2数据库表中。我没有错误，但没有插入数据。这是我的代码：

Int32 newID = 0;
DataTable dtMaxUserID = GeneralClassLibrary.GeneralDataAccessLayer.ExecuteSelect("SELECT MAX(UserID)+1 AS NewID FROM TIUser", false, "TrackitCN");
newID = Convert.ToInt32(dtMaxUserID.Rows[0]["NewID"].ToString());

//Get new users from AllUserData
DataColumn dcRowID = new DataColumn("RowID", typeof(Int32));
//dcRowID.AllowDBNull = false;
dcRowID.AutoIncrement = true;
dcRowID.AutoIncrementSeed = 1;
dcRowID.AutoIncrementStep = 1;
//dcRowID.Unique = true;
//dcRowID.ColumnName = "RowID";
DataTable dtNewUsers = new DataTable();
dtNewUsers.Columns.Add(dcRowID);
dtNewUsers.Columns.Add("MaxID");
dtNewUsers.Columns.Add("UserID");
dtNewUsers.Columns.Add("FullName");
dtNewUsers.Columns.Add("Title");
dtNewUsers.Columns.Add("Phone");
dtNewUsers.Columns.Add("EMailAddr");
dtNewUsers.Columns.Add("Fax");
dtNewUsers.Columns.Add("Dept");
dtNewUsers.Columns.Add("Dept_Num");
dtNewUsers.Columns.Add("Location");
dtNewUsers.Columns.Add("UserDef_1");
dtNewUsers.Columns.Add("UserDef_2");
dtNewUsers.Columns.Add("Login");
dtNewUsers.Columns.Add("Password");
dtNewUsers.Columns.Add("PasswordFlags");
dtNewUsers.Columns.Add("LanguageID");
dtNewUsers.Columns.Add("NTAuthentication");
dtNewUsers.Columns.Add("NTAccount");
dtNewUsers.Columns.Add("SID");
dtNewUsers.Columns.Add("SelfServiceAccess");
dtNewUsers.Columns.Add("ImagePath");
dtNewUsers.Columns.Add("CompFlag");
dtNewUsers.Columns.Add("Employee_ID");
dtNewUsers.Columns.Add("SessionID");
string strQuery = "SELECT " + newID + " AS MaxID, LName" + ", " + "FName AS FullName, Title, Phone, EMail AS EmailAddr, Fax, Department AS Dept, Office AS Location, [Login] AS Employee_ID FROM [User] WHERE StartDate >= CAST(DATEPART(year,getdate()) AS varchar) + '-' + CAST(DATEPART(month,getdate()) AS varchar) + '-' + CAST(DATEPART(day,getdate())-1 AS varchar)";
DataTable dtTemp = GeneralClassLibrary.GeneralDataAccessLayer.ExecuteSelect(strQuery, false, "AllUserDataCN");
foreach (DataRow row in dtTemp.Rows)
    dtNewUsers.ImportRow(row);

SqlTransaction tran = null;
    try
    {
        connection.Open();
        tran = connection.BeginTransaction();

        //Insert new users into TIUser
        SqlDataAdapter TIUser_adapter = new SqlDataAdapter();
        string queryString = "SELECT * FROM TIUser WHERE 1 = 0";
        TIUser_adapter.SelectCommand = new SqlCommand(queryString, connection, tran);
        TIUser_adapter.Fill(dtNewUsers);
        dtNewUsers.AcceptChanges();
        TIUser_adapter.Update(dtNewUsers);

        tran.Commit();
    }
    catch (System.Exception ex)
    {
        tran.Rollback();
        throw ex;
    }
    finally
    {
        connection.Close();
    }

GeneralClassLibrary是我们在这里用于许多事情的类库;这里它只是在数据库上执行SELECT语句。 TIUser是数据库表。 DataTable，dtNewUsers包含一行。我已经通过调试代码并在ImportRow完成后检查DataTable来验证。

在关注user3787557的回复后（谢谢！），我离我更近了，但是我遇到了并发冲突。我正在开发一个开发数据库，我正在做的就是插入一条记录，所以我不知道为什么会出现并发冲突。一种可能性：我通过添加两列来改变DataTable dtNewUsers的结构。但是，在我进行更新之前，我删除了这些列。 InsertCommand很好;我在SSMS中检查了它并进行了解析。这是我的新代码：

using (SqlConnection connection = new SqlConnection(GeneralClassLibrary.GeneralConfigurationManager.ConnectionStrings["TrackitCN"].ConnectionString))
        {
            SqlTransaction tran = null;
            connection.Open();
            tran = connection.BeginTransaction();

            try
            {
                //Create empty TIUser Data Adapter
                SqlDataAdapter TIUser_adapter = new SqlDataAdapter();
                SqlCommandBuilder TIUser_builder = new SqlCommandBuilder(TIUser_adapter);
                string queryString = "SELECT * FROM TIUser WHERE 1 = 0";
                TIUser_adapter.SelectCommand = new SqlCommand(queryString, connection, tran);
                TIUser_adapter.InsertCommand = TIUser_builder.GetInsertCommand();
                TIUser_adapter.UpdateCommand = TIUser_builder.GetUpdateCommand();

                //Get new users from AllUserData
                DataTable dtNewUsers = new DataTable();
                TIUser_adapter.Fill(dtNewUsers);
                DataColumn dcRowID = new DataColumn("RowID", typeof(Int32));
                dcRowID.AutoIncrement = true;
                dcRowID.AutoIncrementSeed = 1;
                dcRowID.AutoIncrementStep = 1;
                dtNewUsers.Columns.Add(dcRowID);
                dtNewUsers.Columns.Add("MaxID");                                        string strQuery = "SELECT " + newID + " AS MaxID, LName + ', ' + FName AS FullName, Title, Phone, EMail AS EmailAddr, Fax, Department AS Dept, Office AS Location, [Login] AS Employee_ID FROM [User] WHERE StartDate >= CAST(DATEPART(year,getdate()) AS varchar) + '-' + CAST(DATEPART(month,getdate()) AS varchar) + '-' + CAST(DATEPART(day,getdate())-1 AS varchar)";
                DataTable dtTemp = GeneralClassLibrary.GeneralDataAccessLayer.ExecuteSelect(strQuery, false, "AllUserDataCN");
                foreach (DataRow row in dtTemp.Rows)
                    dtNewUsers.ImportRow(row);

                //Make sure new users aren't already in Trackit
                foreach (DataRow row in dtNewUsers.Rows)
                {
                    row["UserID"] = (Convert.ToInt32(row["RowID"]) + Convert.ToInt32(row["MaxID"])).ToString();
                    DataTable dtOverlap = GeneralClassLibrary.GeneralDataAccessLayer.ExecuteSelect("SELECT * FROM TIUser WHERE Employee_ID = '" + row["Employee_ID"].ToString() + "'", false, "TrackitCN");
                    if (dtOverlap.Rows.Count > 0)
                        dtNewUsers.Rows.Remove(row);
                }    

                //Remove MaxID and RowID Columns
                dtNewUsers.Columns.Remove("MaxID");
                dtNewUsers.Columns.Remove("RowID")

                TIUser_adapter.Update(dtNewUsers);
                tran.Commit();
            }
            catch (System.Exception ex)
            {
                GeneralClassLibrary.GeneralEmail.ExceptionNotification(System.Reflection.Assembly.GetExecutingAssembly().ToString(), ex.Message, ex.StackTrace);
                tran.Rollback();
                throw ex;
            }
            finally
            {
                connection.Close();
            }
        }

我得到的堆栈跟踪是：

   at System.Data.Common.DbDataAdapter.UpdatedRowStatusErrors(RowUpdatedEventArgs rowUpdatedEvent, BatchCommandInfo[] batchCommands, Int32 commandCount)


at System.Data.Common.DbDataAdapter.UpdatedRowStatus(RowUpdatedEventArgs rowUpdatedEvent, BatchCommandInfo[] batchCommands, Int32 commandCount)



at System.Data.Common.DbDataAdapter.Update(DataRow[] dataRows, DataTableMapping tableMapping)



at System.Data.Common.DbDataAdapter.UpdateFromDataTable(DataTable dataTable, DataTableMapping tableMapping)



at System.Data.Common.DbDataAdapter.Update(DataTable dataTable)



at UpdateTrackitUsers.Program.Main(String[] args) in c:\Users\06717\Documents\Visual Studio 2012\Projects\UpdateTrackitUsersConsole\UpdateTrackitUsersConsole\Program.cs:line 91

第87行是行：

TIUser_adapter.Update(dtNewUsers);

Answer 1

这是适合我的代码。基本上你在代码中缺少的是使用SqlCommandBuilder来创建InsertCommand和UpdateCommand。还要接受AcceptChanges（）的RID。这将导致新行不被发送到数据库。最后一件事：确保将MDF数据库文件（如果您使用的话）标记为“不要复制”，否则每次编译时数据库都会被覆盖，您无法看到更改。

using (SqlConnection connection = new SqlConnection(connectionString))
{
    SqlDataAdapter adapter = new SqlDataAdapter();
    SqlCommandBuilder builder = new SqlCommandBuilder(adapter);

    adapter.SelectCommand = new SqlCommand(queryString, connection);
    adapter.InsertCommand = builder.GetInsertCommand();
    adapter.UpdateCommand = builder.GetUpdateCommand();
    adapter.DeleteCommand = builder.GetDeleteCommand();

    DataTable dt = new DataTable();
    adapter.Fill(dt);

    DataRow row = dt.NewRow();
    row["RegionID"] = 5;
    row["RegionDescription"] = "Some region";
    dt.Rows.Add(row);

    //dt.AcceptChanges();

    int counter = adapter.Update(dt); 
}

ADO.Net INSERT不插入数据

1 个答案: