Solved

C# Execute Query

Posted on 2009-05-02
3
5,392 Views
Last Modified: 2012-05-06
I am writing the code below to change passwords on instances of SQL Server. My first attempt, I tried to connect to the default instance by passing the computer name into the connection string:

SqlConnection conn = new SqlConnection("Data Source=" + computerName + ";Initial Catalog=master;User Id=sa;Password=;");.

However, I had an error during compile. Now I am trying by specifying localhost, but getting an "InvalidOperationException". Can someone look at my code and see what I am doing wrong?

-- PS The sa password is blank and the user names exist on the server.
using System;

using System.Collections.Generic;

using System.Data;

using System.Data.SqlClient;

using System.Text;

using Microsoft.Win32;

 

namespace RegistryTest

{

    class Program

    {

        static void Main(string[] args)

        {

            string[] userNames = new string[] { "John", "Michael" };

 

            string computerName = System.Environment.MachineName;

            string password = "password";

 

            //SqlConnection conn = new SqlConnection("Data Source=" + computerName + ";Initial Catalog=master;User Id=sa;Password=;");

            SqlConnection conn = new SqlConnection("Data Source=localhost;Initial Catalog=master;User Id=sa;Password=;");

 

            foreach (string userName in userNames)

            {

                SqlCommand cmd = new SqlCommand("ALTER LOGIN [" + userName + "] WITH PASSWORD=N'" + password + "', conn");

                conn.Open();

                cmd.ExecuteNonQuery();

                conn.Close();

            }

 

            Console.WriteLine("FIN");

        }

    }

}

Open in new window

0
Comment
Question by:computerstreber
  • 2
3 Comments
 
LVL 142

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 24288915
this line is wrong:

                SqlCommand cmd = new SqlCommand("ALTER LOGIN [" + userName + "] WITH PASSWORD=N'" + password + "', conn");
                conn.Open();


must be:

                SqlCommand cmd = new SqlCommand("ALTER LOGIN [" + userName + "] WITH PASSWORD=N'" + password + "' ", conn);
                conn.Open();
0
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 24288916
explanation: in your code, the ",conn" was part of the connection string, instead of specifying the second parameter for the new SqlCommand,..
0
 
LVL 3

Author Closing Comment

by:computerstreber
ID: 31577291
Awesome... that worked beautifully....
0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Introduction This article series is supposed to shed some light on the use of IDisposable and objects that inherit from it. In essence, a more apt title for this article would be: using (IDisposable) {}. I’m just not sure how many people would ge…
Summary: Persistence is the capability of an application to store the state of objects and recover it when necessary. This article compares the two common types of serialization in aspects of data access, readability, and runtime cost. A ready-to…
This video shows how to remove a single email address from the Outlook 2010 Auto Suggestion memory. NOTE: For Outlook 2016 and 2013 perform the exact same steps. Open a new email: Click the New email button in Outlook. Start typing the address: …
This tutorial demonstrates a quick way of adding group price to multiple Magento products.

706 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now