.NET参数化Oracle查询参数

string sqlstr = " select * from table where id=? and name=? ";
System.Data.OleDb.OleDbParameter parameters = new System.Data.OleDb.OleDbParameter[2];
parameters[0] = new OleDbParameter("id", uid);
parameters[1] = new OleDbParameter("name", name);

string sqlstr = " select * from table where id=:id and name=:name ";
System.Data.OracleClient.OracleParameter parameters = new System.Data.OracleClient.OracleParameter[2];
parameters[0] = new OracleParameter(":id", uid);
parameters[1] = new OracleParameter(":name", name);

在通过OLEDB传递参数时候需要注意的问题

对于ACCESS数据库 可以是?cmd.CommandText = "insert into shop(ShopName,ShopAddress) Values(@sn,@sadd)";

但是对于SQL数据库 就是cmd.CommandText = "insert into shop(ShopName,ShopAddress) Values(?,?)";

而且在ACCESS中对于传递的参数的添加顺序 即使给出变量名 也必须和SQL语句调用的顺序一致 否则会出错

比如

? cmd.CommandText = "insert into shop(ShopName,ShopAddress) Values(@sn,@sadd)";
cmd.Parameters.Clear();

p = new OleDbParameter();
p.ParameterName = "@sn"; p.OleDbType = OleDbType.Char; p.Value = sn;
cmd.Parameters.Add(p);

p = new OleDbParameter();
p.ParameterName = "@sadd"; p.OleDbType = OleDbType.Char; p.Value = sadd;
cmd.Parameters.Add(p);

因为语句中Values(@sn,@sadd)

@sn在@sadd之前 如果你在写参数的时候把和@sadd的顺序写反 那么传递的参数也会反过来 即使你的?p.ParameterName定义准确了也一样