我是一个使用mySQL数据适配器并插入新行的函数。
我希望函数返回更新行的自动递增列的值。
请帮忙。
Public Function addRow(ByVal colA as String, ByVal colB as String) As Integer
Dim dbConnection As New MySqlConnection("server=xxx; user id=xxx; password=xxx; database=xxx; pooling=false;")
Dim dbDataAdapter As New MySqlDataAdapter("SELECT * FROM table", dbConnection)
Dim dbDataSet As DataSet = New DataSet
dbDataAdapter.Fill(dbDataSet, "table")
Dim dbNewRow As DataRow = dbDataSet.Tables("table").NewRow
dbNewRow("colA") = colA
dbNewRow("colB") = colB
dbDataSet.Tables("table").Rows.Add(dbNewRow)
dbDataAdapter.InsertCommand = New MySqlCommand("INSERT into table(colA, colB) VALUES (@colA, @colB)", dbConnection)
dbDataAdapter.InsertCommand.Parameters.Add("colA", MySqlDbType.VarChar, 256, "colA")
dbDataAdapter.InsertCommand.Parameters.Add("colB", MySqlDbType.VarChar, 256, "colB")
Dim dbParm As MySqlParameter = dbDataAdapter.InsertCommand.Parameters.Add("@colID", MySqlDbType.Int16, 16, "colID")
dbParm.Direction = ParameterDirection.ReturnValue
dbDataAdapter.Update(dbDataSet, "table")
Return dbDataAdapter.InsertCommand.Parameters("@colID").Value
End Function
答案 0 :(得分:1)
假设插入存储过程正在执行类似
的操作RETURN @@IDENTITY
您将需要相当于:
oDatabase.AddParameter(oDbCommand, "@RETURN_VALUE", System.Data.DbType.Int32, System.Data.ParameterDirection.ReturnValue, "", System.Data.DataRowVersion.Current, null);
...
oDbCommand.ExecuteNonQuery();
returnStatusCode = (int)oDbCommand.Parameters[0].Value;
答案 1 :(得分:0)
试试这个:
Dim result As Integer = 0
Integer.TryParse(dbDataAdapter.InsertCommand.Parameters("@colID").Value, result)
Return result
答案 2 :(得分:0)
我自己也做了。
Public Function addRow(ByVal colA as String, ByVal colB as String) As Integer
Dim dbConnection As New MySqlConnection("server=xxx; user id=xxx; password=xxx; database=xxx; pooling=false;")
Dim dbDataAdapter As New MySqlDataAdapter("SELECT * FROM table where colID = 0", dbConnection)
Dim dbDataSet As DataSet = New DataSet
dbDataAdapter.Fill(dbDataSet, "table")
Dim dbNewRow As DataRow = dbDataSet.Tables("table").NewRow
dbNewRow("colA") = colA
dbNewRow("colB") = colB
dbDataSet.Tables("table").Rows.Add(dbNewRow)
dbDataAdapter.InsertCommand = New MySqlCommand("INSERT into table(colA, colB) VALUES (@colA, @colB); Select * from table where colID = LAST_INSERT_ID()", dbConnection)
dbDataAdapter.InsertCommand.Parameters.Add("colA", MySqlDbType.VarChar, 256, "colA")
dbDataAdapter.InsertCommand.Parameters.Add("colB", MySqlDbType.VarChar, 256, "colB")
dbDataAdapter.Update(dbDataSet, "table")
Return dbDataSet.Tables("table").Rows(0).Item(0)
End Function
似乎我需要做的就是在Insert语句的末尾添加一个Select语句,并使用LAST_INSERT_ID函数来获取最后一个Inserted行。然后只需读取那一行ID并返回它。
DataAdapters以这种方式工作,我感到非常失望。我相信经典ASP比这更容易!感谢所有回复的人。