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12.31.2007 at 06:43AM PST, ID: 23050725

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7.6

how to insert a record into ms sql database in c# using visual studio 2005

Zones: Microsoft Visual C#.Net, ADO.Net Class Library

Tags: insert, sql, database, using, record

Hi,

I am trying to find out how to execute the following sql statment to my ms sql database in c# winforms using visual studio 2005: -

INSERT INTO Users Values (NewID(), 'Eljay', 'c:\pics\pic1.jpg', 'c:\pics\pic2.jpg')

I have the following code that queries the database that shows the connection string I am using: -
//Create new virtual dataset
DataSet yds = new DataSet();

//Create connection to mdf sql file
System.Data.SqlClient.SqlConnection con =
new System.Data.SqlClient.SqlConnection(
@"Data Source=.\sqlexpress;AttachDbFilename=|DataDirectory|\MainDB.mdf;Integrated Security=True;User Instance=True");

//Create new data adapter and perform query
System.Data.SqlClient.SqlDataAdapter da = new System.Data.SqlClient.SqlDataAdapter(
"Select * from users order by Username", con.ConnectionString);

// place result into virtual dataset yds
da.Fill(yds);

//Bind virtual dataset yds to combobox and display username but value is the userID index
cmbUsers.DisplayMember = "Username";
cmbUsers.ValueMember = "UserID";
cmbUsers.DataSource = yds.Tables[0];

Many thanks
Lee

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Question Stats

Zone: Microsoft

Question Asked By: ljhodgett

Solution Provided By: sjturner2

Participating Experts: 1

Solution Grade: A

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12.31.2007 at 07:20AM PST, ID: 20555289

sjturner2:

You don't need to use a dataset, just a sql command and parameters:

      SqlCommand cmd = new SqlCommand(
            "INSERT INTO Users (Name, [...]) Values (@paramName, [....] )", conn);

      cmd.CommandType = CommandType.Text;

      cmd.Parameters.Add(
            new SqlParameter("@paramName", name)); (etc..)

cmd.ExecuteNonQuery();

Accepted Solution

12.31.2007 at 07:51AM PST, ID: 20555563

ljhodgett:

Isn't the parameters for stored procedures or am I missing something. Sorry I'm new to c# as I have been dealing with vb.

I have tried the following: -

System.Data.SqlClient.SqlConnection con =
new System.Data.SqlClient.SqlConnection(
@"Data Source=.\sqlexpress;AttachDbFilename=|DataDirectory|\MainDB.mdf;Integrated Security=True;User Instance=True");

con.Open();
SqlCommand cmd = new SqlCommand(
"INSERT INTO Users Values (newID(), 'Test', 'test', 'tesT')", con);

cmd.CommandType = CommandType.Text;

cmd.ExecuteNonQuery();
con.Close();

but it does not seem to insert any records.

Best Regards
Lee

12.31.2007 at 08:06AM PST, ID: 20555689

sjturner2:

does the line:

INSERT INTO Users Values (newID(), 'Test', 'test', 'tesT')"

work in query analyzer? (try it) Don't you need to specify the column names? i.e:

INSERT INTO Users (Id, name, age ... Values newID(), 'Test', 'test', 'tesT')", conn);

You can use parameters for text commands. Just put @<pamName> in the sql and then create a parameter with the same name and add ot to the parameters collection of the command.

12.31.2007 at 08:57AM PST, ID: 20556082

ljhodgett:

Hi,

Yes it works in the query analizer as this is how i have done it in vb.net but would like to know how I can do it in C#.

Best Regards
Lee

12.31.2007 at 09:35AM PST, ID: 20556342

sjturner2:

Try using
...(" + Guid.NewGid().ToString() ", ...

instead of the NewID(). Are you getting any errors on the cmd.ExecuteNonQuery() ?

12.31.2007 at 10:13AM PST, ID: 20556544

ljhodgett:

Still no joy i'm afraid.

I've found an example that shows the following code that I have changed to suit my connection string etc: -

SqlConnection mySqlConnection = new SqlConnection(@"Data Source=.\sqlexpress;AttachDbFilename=|DataDirectory|\MainDB.mdf;Integrated Security=True;User Instance=True");

SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
mySqlCommand.CommandText = "insert into users values(newID(), 'eljay', 'test', 'test1')";

mySqlConnection.Open();

mySqlCommand.ExecuteNonQuery();

mySqlConnection.Close();

It runs the code but doesn't come up with any error messages. Is there a way to see how many rows were affected.

Best regards
Lee

12.31.2007 at 10:29AM PST, ID: 20556645

sjturner2:

Yes, instead of ExecuteNoNQuery use ExecutScalar i.e:

int affected = (int)cmd.ExecuteScalar();

12.31.2007 at 10:30AM PST, ID: 20556655

sjturner2:

This sample from MSDN should help:

static public int AddProductCategory(string newName, string connString)
{
Int32 newProdID = 0;
string sql =
"INSERT INTO Production.ProductCategory (Name) VALUES (@Name); "
+ "SELECT CAST(scope_identity() AS int)";
using (SqlConnection conn = new SqlConnection(connString))
{
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.Add("@Name", SqlDbType.VarChar);
cmd.Parameters["@name"].Value = newName;
try
{
conn.Open();
newProdID = (Int32)cmd.ExecuteScalar();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
return (int)newProdID;
}

from:
http://msdn2.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.executescalar.aspx

20080716-EE-VQP-33 / EE_QW_2_20070628