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How to use OleDbParameters with a query
Posted: 11 Dec 08 11:32 AM
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Sorry for asking what appears to be a very basic question. I've never worked with oledb or SalesLogix.
In psudocode I want to do this:
string sql = "Select * from accounts where accountID = @accountID";
OleDbParameter parm = new OleDbParameter("@accountID", "xyz123");
OleDbCommand cmd = new OleDbCommand(sql);
cmd.Parameters.Add(parm);
// etc...
I am getting the error message: "Must declare the scalar variable"@accountID"
I am able to connect to the server and run other queries.
Thanks for any help. Code is below.
Sam
====================================================================================
using System;
using System.Data;
using System.Data.OleDb;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
///
/// Summary description for SLXAccounts
///
public class SLXAccounts
{
public static SLXAccount GetAccount(string accountID)
{
DataSet ds = SLXAccounts.GetAccounts(accountID);
SLXAccount account = null;
if (ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
{
DataRow dr = ds.Tables[0].Rows[0];
account.AccountID = Utilities.ObjectToString(dr["AccountID"]);
account.AccountName = Utilities.ObjectToString(dr["Account"]);
}
return account;
}
public static DataSet GetAccounts(string accountID)
{
string sql = "SELECT AC.ACCOUNTID, AC.ACCOUNT, AC.ACCOUNT, AD.ADDRESS1, AD.ADDRESS2, " +
"AD.CITY, AD.STATE, AD.POSTALCODE, AD.COUNTRY FROM sysdba.ACCOUNT AC " +
"JOIN sysdba.ADDRESS AD on AC.ADDRESSID = AD.ADDRESSID " +
"WHERE AC.STATUS = 'Active' " +
"AND (AC.ACCOUNTID = @AccountID OR @AccountID IS NULL) ORDER BY AC.ACCOUNT ";
OleDbParameter[] parms = new OleDbParameter[1];
parms[0] = new OleDbParameter("@AccountID", accountID);
return SLXAccounts.ExecuteDataSet(sql, CommandType.Text, parms);
}
public static DataSet ExecuteDataSet(string sql, CommandType commandType, OleDbParameter[] parms)
{
string connectionString = ConfigurationManager.ConnectionStrings["SLXString"].ToString();
OleDbConnection con = new OleDbConnection(connectionString);
OleDbCommand cmd = new OleDbCommand(sql, con);
cmd.CommandType = commandType;
if (parms.Length > 0)
cmd.Parameters.AddRange(parms);
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
return ds;
}
}
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Re: How to use OleDbParameters with a query
Posted: 12 Dec 08 11:10 AM
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Thank you - I'll use that.
I'm surprised that paramaterized queries dont work the same way they do with the sqlcommand object. Is that a saleslogix feature or an oledb feature ? |
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Re: How to use OleDbParameters with a query
Posted: 15 Dec 08 10:59 AM
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Replace your named parameters with ?.
for example:
SELECT COUNT(*) FROM ACCOUNT WHERE ACCOUNTID = ?
We use parameters 95% of the time and they work great.
Timmus |
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