我已经尝试了几天,并尝试让存储过程在vb.net中运行,但我似乎无法使其工作。
如果有人能帮助我,我真的很感激。我一直在努力解决这个问题,但我找不到解决方案。
Private Sub getID()
Dim ds As New DataSet
Dim con_str = ""
Dim con As MySql.Data.MySqlClient.MySqlConnection = New MySql.Data.MySqlClient.MySqlConnection(con_str)
con.Open()
Dim cmd As MySql.Data.MySqlClient.MySqlCommand = New MySql.Data.MySqlClient.MySqlCommand
cmd.CommandType = CommandType.StoredProcedure
cmd.CommandText = "getID()"
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.AddWithValue("@id", "113")
Dim da As MySql.Data.MySqlClient.MySqlDataAdapter = New MySql.Data.MySqlClient.MySqlDataAdapter(cmd)
Dim dt As New DataTable
da.SelectCommand.Connection = con
da.Fill(dt)
End Sub
当我尝试运行此操作时,我在行da.Fill(dt)上获得异常“PROCEDURE otrs.getID的参数数量不正确;预期为1,得到0”。我真的不知道为什么会这样。我的存储过程中没有声明参数。
我的存储过程应该没问题。从dbms中调用它很好,但是这里仍然是代码:
delimiter $$
CREATE DEFINER=`otrs`@`%` PROCEDURE `getCIs`()
BEGIN
SELECT
l.source_key AS base_id,
c1.configitem_number AS base_number,
v.name as base_name,
l.target_key AS link_id,
c2.configitem_number AS link_number,
v1.name as link_name,
t.name as link_type
FROM
otrs.link_relation AS l
INNER JOIN
otrs.configitem AS c1
ON l.source_key = c1.id
INNER JOIN
otrs.configitem AS c2
ON l.target_key = c2.id
INNER JOIN
otrs.link_type AS t
INNER JOIN
otrs.configitem_version AS v
ON l.source_key = v.configitem_id
INNER JOIN
otrs.configitem_version AS v1
ON l.target_key = v1.configitem_id;
END$$
是的,我确实使用了搜索功能,而且我搜索了很多内容,但我仍然感谢任何关于我的问题的信息。
所以我发现错了。显然你不需要在procedure-name之后的()。我不是100%肯定,因为现在根本没有发生任何事情:
Private Sub getID()
Dim ds As New DataSet
Dim con_str = ""
Dim con As MySql.Data.MySqlClient.MySqlConnection = New MySql.Data.MySqlClient.MySqlConnection(con_str)
con.Open()
Dim cmd As MySql.Data.MySqlClient.MySqlCommand = New MySql.Data.MySqlClient.MySqlCommand
cmd.CommandType = CommandType.StoredProcedure
Try
cmd.CommandText = "getID"
Catch ex As Exception
MsgBox(ex.Message())
End Try
cmd.Parameters.AddWithValue("@id", 113)
cmd.Connection = con
Dim da As MySql.Data.MySqlClient.MySqlDataAdapter = New MySql.Data.MySqlClient.MySqlDataAdapter(cmd)
Dim dt As New DataTable
Try
da.Fill(dt)
Catch ex As Exception
MsgBox(ex.Message())
End Try
End Sub
答案 0 :(得分:1)
你永远不会真正执行cmd。另外,如上所述,proc调用不需要括号。看起来应该是这样的。
MySqlDataAdapter mySqlDataAdapter = new MySqlDataAdapter("getID", con);
DataSet DS = new DataSet();
mySqlDataAdapter.Fill(DS);
答案 1 :(得分:0)
这行错误,它使用“call getID()”命令文本创建一个新命令,并将其添加到没有参数的适配器
Dim da As MySql.Data.MySqlClient.MySqlDataAdapter = _
New MySql.Data.MySqlClient.MySqlDataAdapter("call getID()", con_str)
你想要
cmd.CommandText = "getID"
Dim da As MySql.Data.MySqlClient.MySqlDataAdapter = _
New MySql.Data.MySqlClient.MySqlDataAdapter(cmd, con_str)