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[英]Insert data from a datatable and declared variable into a table using a stored procedure
[英]Insert datatable into a database table from a stored procedure
我有一個帶有一些行的數據表,我需要使用存儲過程將該數據表插入數據庫。
For Each row As DataRow In dt.Rows
cmd.Parameters.Add(New MySqlParameter("@DOWNLOAD_ID", dt.Rows(0)("DOWNLOAD_ID").ToString()))
cmd.Parameters.Add(New MySqlParameter("@FINALY_FIELDCODE", dt.Rows(0)("FINALY_FIELDCODE").ToString().Replace("|", "").ToString()))
cmd.Parameters.Add(New MySqlParameter("@UNITS", dt.Rows(0)("UNITS").ToString()))
cmd.Parameters.Add(New MySqlParameter("@CURRECY_CODE", dt.Rows(0)("CURRENCY_CODE").ToString()))
Next
cmd.ExecuteNonQuery()
當我這樣做時,我得到了一個異常{"Parameter '@DOWNLOAD_ID' has already been defined."}
如何擺脫這個異常,我們是否可以插入數據表而沒有for循環。 誰能幫我
您應該創建單獨的MySqlCommands並直接執行它們:
Using mysqlConnection = New MySqlConnection(connectionString)
mysqlConnection.Open()
For Each row As DataRow In dt.Rows
Using cmd = New MySqlCommand("StoredProcedureName", mysqlConnection)
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.Add(New MySqlParameter("@DOWNLOAD_ID", dt.Rows(0)("DOWNLOAD_ID").ToString()))
cmd.Parameters.Add(New MySqlParameter("@FINALY_FIELDCODE", dt.Rows(0)("FINALY_FIELDCODE").ToString().Replace("|", "").ToString()))
cmd.Parameters.Add(New MySqlParameter("@UNITS", dt.Rows(0)("UNITS").ToString()))
cmd.Parameters.Add(New MySqlParameter("@CURRECY_CODE", dt.Rows(0)("CURRENCY_CODE").ToString()))
cmd.ExecuteNonQuery()
End Using
Next
End Using
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