我正在处理需要同时使用SQL Server连接和本地数据库的C＃程序，我可以使用ExecuteReader（）轻松地从两个数据库中检索数据。这意味着连接正在成功执行。
但是当我尝试使用ExecuteNonQuery（）时;它只是在处理本地数据库时抛出System.InvalidOperationException，没有其他信息。连接到SQL Server时它可以正常工作
这是我遇到问题的功能：
public String myFunction(String TLV, String SPName, String BD)
{
if (mdbEnabled.Checked == true)
{
string connectionString = string.Format("Provider={0}; Data Source={1}; Jet OLEDB:Engine Type={2}",
"Microsoft.Jet.OLEDB.4.0", BD, 5);
using (System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection(connectionString))
{
try
{
conn.Open();
System.Data.OleDb.OleDbCommand SP = new System.Data.OleDb.OleDbCommand();
SP.Connection = conn;
SP.CommandType = System.Data.CommandType.StoredProcedure;
SP.CommandText = SPName;
System.Data.OleDb.OleDbParameter IN_ERC = new System.Data.OleDb.OleDbParameter();
IN_ERC.ParameterName = "@IN_ERC"; IN_ERC.DbType = System.Data.DbType.Int32; IN_ERC.Direction = System.Data.ParameterDirection.Output; IN_ERC.Value = 0;
System.Data.OleDb.OleDbParameter CH_ASM = new System.Data.OleDb.OleDbParameter();
CH_ASM.ParameterName = "@CH_ASM"; CH_ASM.DbType = System.Data.DbType.String; CH_ASM.Direction = System.Data.ParameterDirection.Output; CH_ASM.Value = 0; CH_ASM.Size = 1000;
System.Data.OleDb.OleDbParameter IN_ASM = new System.Data.OleDb.OleDbParameter();
IN_ASM.ParameterName = "@IN_ASM"; IN_ASM.DbType = System.Data.DbType.Int32; IN_ASM.Direction = System.Data.ParameterDirection.Output; IN_ASM.Value = 0;
System.Data.OleDb.OleDbParameter CH_DSM = new System.Data.OleDb.OleDbParameter();
CH_DSM.ParameterName = "@CH_DSM"; CH_DSM.DbType = System.Data.DbType.String; CH_DSM.Direction = System.Data.ParameterDirection.Input; CH_DSM.Value = TLV;
System.Data.OleDb.OleDbParameter IN_DSM = new System.Data.OleDb.OleDbParameter();
IN_DSM.ParameterName = "@IN_DSM"; IN_DSM.DbType = System.Data.DbType.Int32; IN_DSM.Direction = System.Data.ParameterDirection.Input; IN_DSM.Value = 0;
SP.Parameters.Add(IN_ERC);
SP.Parameters.Add(CH_ASM);
SP.Parameters.Add(IN_ASM);
SP.Parameters.Add(CH_DSM);
SP.Parameters.Add(IN_DSM);
try
{
SP.ExecuteNonQuery();//this always fails
}
catch
{
MessageBox.Show("error en SP.ExecuteNonQuery();");
}
conn.Close();
Console.WriteLine("IN_ERC: " + SP.Parameters["@IN_ERC"].Value);
Console.WriteLine("CH_ASM: " + SP.Parameters["@CH_ASM"].Value);
Console.WriteLine("IN_ASM: " + SP.Parameters["@IN_ASM"].Value);
return SP.Parameters["@CH_ASM"].Value.ToString();
}
catch (Exception err)
{
return null;
}
}
}
else
{
using (SqlConnection conn = new SqlConnection(BD))
{
try
{
conn.Open();
SqlCommand SP = new SqlCommand();
SP.Connection = conn;
SP.CommandType = System.Data.CommandType.StoredProcedure;
SP.CommandText = SPName;
SqlParameter IN_ERC = new SqlParameter();
IN_ERC.ParameterName = "@IN_ERC"; IN_ERC.SqlDbType = System.Data.SqlDbType.Int; IN_ERC.Direction = System.Data.ParameterDirection.Output; IN_ERC.Value = 0;
SqlParameter CH_ASM = new SqlParameter();
CH_ASM.ParameterName = "@CH_ASM"; CH_ASM.SqlDbType = System.Data.SqlDbType.NVarChar; CH_ASM.Direction = System.Data.ParameterDirection.Output; CH_ASM.Value = 0; CH_ASM.Size = 1000;
SqlParameter IN_ASM = new SqlParameter();
IN_ASM.ParameterName = "@IN_ASM"; IN_ASM.SqlDbType = System.Data.SqlDbType.Int; IN_ASM.Direction = System.Data.ParameterDirection.Output; IN_ASM.Value = 0;
SqlParameter CH_DSM = new SqlParameter();
CH_DSM.ParameterName = "@CH_DSM"; CH_DSM.SqlDbType = System.Data.SqlDbType.NVarChar; CH_DSM.Direction = System.Data.ParameterDirection.Input; CH_DSM.Value = TLV;
SqlParameter IN_DSM = new SqlParameter();
IN_DSM.ParameterName = "@IN_DSM"; IN_DSM.SqlDbType = System.Data.SqlDbType.Int; IN_DSM.Direction = System.Data.ParameterDirection.Input; IN_DSM.Value = 0;
SP.Parameters.Add(IN_ERC);
SP.Parameters.Add(CH_ASM);
SP.Parameters.Add(IN_ASM);
SP.Parameters.Add(CH_DSM);
SP.Parameters.Add(IN_DSM);
try
{
SP.ExecuteNonQuery();//this always works
}
catch
{
MessageBox.Show("error en SP.ExecuteNonQuery();");
}
conn.Close();
Console.WriteLine("IN_ERC: " + SP.Parameters["@IN_ERC"].Value);
Console.WriteLine("CH_ASM: " + SP.Parameters["@CH_ASM"].Value);
Console.WriteLine("IN_ASM: " + SP.Parameters["@IN_ASM"].Value);
return SP.Parameters["@CH_ASM"].Value.ToString();
}
catch (Exception err)
{
return null;
}
}
}
}
我使用以下参数调用该函数：
someString = myFunction(OPN_ASM, "OPN_ASM", BD);
根据mdbEnabled.Checked属性值设置BD变量，它可以是：
C:\Users\Angcrad\Documents\Visual Studio 2015\Projects\myDB.mdb
如果mdbEnabled.Checked == true
或
Data Source=ANGCRAD\SQLEXPRESS;Initial Catalog=myDB;Integrated Security=True
如果mdbEnabled.Checked == false
＆＃34; myDB.mdb＆＃34;文件是从SQL Server上的myDB数据库导出的，因此两个数据库都具有相同的元素。希望你能帮助我追踪错误，提前谢谢