Objects used from System.Data.SqlClient namespace:
SqlConnection
SqlCommand
SqlDataReader
SqlDataAdapter
Process:
Step 1: Add namespace for using SqlClient
Step 2: Set up connection to database
Step 3: Open database connection
Step 4: Set the T-SQL command(s) – Use the “SqlCommand” object
Step 5: Open the SqlDataReader – Execute the T-SQL command(s)
Step 6: Display the results (if any)
Step 7: Close the SqlDataReader
Step 8: Close the database connection
Source Code (for obvious reasons I removed the connection string from the source code file)
You can find the sample source code for this post here.
*Note: This sample code is for demo purposes and should not be used as production code.
Considerations
My example is based on the example in my previous post on SQL Azure (Database Name: sqlazure, table name: CLOUD_MSGS)
For this post I used a new Visual C# “Console Application” project named ADO .NET – SQL Azure like in the following screenshot:
Screenshot of the output:
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Artemakis Artemiou is a seasoned Senior Database and AI/Automation Architect with over 20 years of expertise in the IT industry. As a Certified Database, Cloud, and AI professional, he has been recognized as a thought leader, earning the prestigious Microsoft Data Platform MVP title for nine consecutive years (2009-2018). Driven by a passion for simplifying complex topics, Artemakis shares his expertise through articles, online courses, and speaking engagements. He empowers professionals around the globe to excel in Databases, Cloud, AI, Automation, and Software Development. Committed to innovation and education, Artemakis strives to make technology accessible and impactful for everyone.
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2 thoughts on “Accessing SQL Azure Using ADO.NET”
I am not able to connect to SQL Azure.
Here is what my code is:
using (SqlConnection conn = new SqlConnection("Server=ufh1cinawq.database.windows.net;Database=MASTER;User ID=vksingh24;Password=xxx;Trusted_Connection=False")) { using (SqlCommand command = conn.CreateCommand()) { conn.Open();
// Create a table command.CommandText = "CREATE TABLE Vikash(Col1 int primary key, Col2 varchar(20))"; command.ExecuteNonQuery();
// Insert sample records command.CommandText = "INSERT INTO Vikash(col1, col2) values (1, 'Vikash Kumar Singh'), (2, 'Kumar Saurabh'), (3, 'RockStar')"; int rowsAdded = command.ExecuteNonQuery();
// Query the table and print the results command.CommandText = "SELECT * FROM Vikash";
using (SqlDataReader reader = command.ExecuteReader()) { // Loop over the results while (reader.Read()) { MessageBox.Show(reader["Col1"].ToString().Trim()); MessageBox.Show(reader["Col2"].ToString().Trim()); } reader.Close(); }
conn.Close(); } }
I also check the firewall setting. Please help me to connect to SQL Azure.
Hi,
You need to properly configure the Firewall settings from within the SQL Azure – Server Administration web page.
To this end you can add a new Firewall rule, give it a name you like, and in the IP range include your public IP (the "Add Firewall Rule" dialog displays your public IP).
Then wait for a few minutes and try again.
I have also noticed that in the connection string you are using the "master" database and then you are trying to create a new table in it. Note that you cannot create a table in the master database as it is a system database. You can create a new database instead and work with it.
Hope this helps!
Cheers, Artemakis
Comments are closed.
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I am not able to connect to SQL Azure.
Here is what my code is:
using (SqlConnection conn = new SqlConnection("Server=ufh1cinawq.database.windows.net;Database=MASTER;User ID=vksingh24;Password=xxx;Trusted_Connection=False"))
{
using (SqlCommand command = conn.CreateCommand())
{
conn.Open();
// Create a table
command.CommandText = "CREATE TABLE Vikash(Col1 int primary key, Col2 varchar(20))";
command.ExecuteNonQuery();
// Insert sample records
command.CommandText = "INSERT INTO Vikash(col1, col2) values (1, 'Vikash Kumar Singh'), (2, 'Kumar Saurabh'), (3, 'RockStar')";
int rowsAdded = command.ExecuteNonQuery();
// Query the table and print the results
command.CommandText = "SELECT * FROM Vikash";
using (SqlDataReader reader = command.ExecuteReader())
{
// Loop over the results
while (reader.Read())
{
MessageBox.Show(reader["Col1"].ToString().Trim());
MessageBox.Show(reader["Col2"].ToString().Trim());
}
reader.Close();
}
conn.Close();
}
}
I also check the firewall setting. Please help me to connect to SQL Azure.
Hi,
You need to properly configure the Firewall settings from within the SQL Azure – Server Administration web page.
To this end you can add a new Firewall rule, give it a name you like, and in the IP range include your public IP (the "Add Firewall Rule" dialog displays your public IP).
Then wait for a few minutes and try again.
I have also noticed that in the connection string you are using the "master" database and then you are trying to create a new table in it. Note that you cannot create a table in the master database as it is a system database. You can create a new database instead and work with it.
Hope this helps!
Cheers,
Artemakis