C# OLEDBEException行-00001无法分配内存
我正在尝试使用c从oracle数据库获取数据。我使用的是System.Data.OracleClient.dll,但由于它已过时,我决定将其更改为System.Data.Oledb。 我的连接:C# OLEDBEException行-00001无法分配内存,c#,sql,oracle,oledb,C#,Sql,Oracle,Oledb,我正在尝试使用c从oracle数据库获取数据。我使用的是System.Data.OracleClient.dll,但由于它已过时,我决定将其更改为System.Data.Oledb。 我的连接: connection = new OleDbConnection(); connection.ConnectionString = string.Format("Provider=OraOLEDB.Oracle;Data Source={0};User ID={1};Password=23};", so
connection = new OleDbConnection();
connection.ConnectionString = string.Format("Provider=OraOLEDB.Oracle;Data Source={0};User ID={1};Password=23};", source, user, password);
以下是我获取数据的方法:
public ContactInfo GetInfo(string telnr)
{
connection.Open();
Console.WriteLine("OracleState: {0}", connection.State);
OleDbCommand command = connection.CreateCommand();
string sql = @"Select t1.bed_bedrijfsnr
, t1.pers_persoonsnr
, REPLACE(REPLACE(REPLACE(REPLACE(t1.telefoonnr, ' ', ''), '-', ''), '(', ''), ')', '') as telnr
, REPLACE(REPLACE(REPLACE(REPLACE(t1.gsmnr, ' ', ''), '-', ''), '(', ''), ')', '') as gsmnr
, t1.e_mail
, t2.synoniem
, t2.sales_coordinator
From table1 t1
, table2 t2
Where t1.bed_bedrijfsnr = t2.bedrijfsnr
And (REPLACE(REPLACE(REPLACE(REPLACE(t1.telefoonnr, ' ', ''), '-', ''), '(', ''), ')', '') = :tel Or REPLACE(REPLACE(REPLACE(REPLACE(t1.gsmnr, ' ', ''), '-', ''), '(', ''), ')', '') = :tel);";
command.CommandText = sql;
command.Parameters.Add(new OleDbParameter(":tel", telnr));
ContactInfo c = null;
OleDbDataReader reader = command.ExecuteReader();
while (reader.Read())
{
//readdata
}
reader.Close();
connection.Close();
Console.WriteLine("Oracle State: {0}", connection.State);
return c;
}
当我将sql语句更改为从表1中选择*时,它可以工作,但对于此语句,visual studio在“OleDbDataReader=command.ExecuteReader;”上显示“OLEDBEException row-00001无法分配内存” 我不确定它为什么会生成那个特定的错误,但当您使用参数时。添加它似乎不会替换多个参数实例 因为在SQL语句中使用了:tel两次,所以需要使用参数。添加两次。如果重复使用相同的参数名,似乎效果不错,但我还是重命名了我的参数名
string sql = @"Select t1.bed_bedrijfsnr
, t1.pers_persoonsnr
, REPLACE(REPLACE(REPLACE(REPLACE(t1.telefoonnr, ' ', ''), '-', ''), '(', ''), ')', '') as telnr
, REPLACE(REPLACE(REPLACE(REPLACE(t1.gsmnr, ' ', ''), '-', ''), '(', ''), ')', '') as gsmnr
, t1.e_mail
, t2.synoniem
, t2.sales_coordinator
From table1 t1
, table2 t2
Where t1.bed_bedrijfsnr = t2.bedrijfsnr
And (REPLACE(REPLACE(REPLACE(REPLACE(t1.telefoonnr, ' ', ''), '-', ''), '(', ''), ')', '') = :tel1 Or REPLACE(REPLACE(REPLACE(REPLACE(t1.gsmnr, ' ', ''), '-', ''), '(', ''), ')', '') = :tel2);";
command.CommandText = sql;
command.Parameters.Add(new OleDbParameter(":tel1", telnr));
command.Parameters.Add(new OleDbParameter(":tel2", telnr));
我不确定它为什么会产生那个特定的错误,但当你使用参数时。添加它似乎不会代替多个参数实例 因为在SQL语句中使用了:tel两次,所以需要使用参数。添加两次。如果重复使用相同的参数名,似乎效果不错,但我还是重命名了我的参数名
string sql = @"Select t1.bed_bedrijfsnr
, t1.pers_persoonsnr
, REPLACE(REPLACE(REPLACE(REPLACE(t1.telefoonnr, ' ', ''), '-', ''), '(', ''), ')', '') as telnr
, REPLACE(REPLACE(REPLACE(REPLACE(t1.gsmnr, ' ', ''), '-', ''), '(', ''), ')', '') as gsmnr
, t1.e_mail
, t2.synoniem
, t2.sales_coordinator
From table1 t1
, table2 t2
Where t1.bed_bedrijfsnr = t2.bedrijfsnr
And (REPLACE(REPLACE(REPLACE(REPLACE(t1.telefoonnr, ' ', ''), '-', ''), '(', ''), ')', '') = :tel1 Or REPLACE(REPLACE(REPLACE(REPLACE(t1.gsmnr, ' ', ''), '-', ''), '(', ''), ')', '') = :tel2);";
command.CommandText = sql;
command.Parameters.Add(new OleDbParameter(":tel1", telnr));
command.Parameters.Add(new OleDbParameter(":tel2", telnr));