将数据插入SQL Server数据库-Winforms

Question

I am trying to insert the data once user clicks on button "druk". The connection string does not seem to be set properly as the debug stop at this point and does not go further. I have the Data Connection set and connected. I have removed and replaced username from connection string due to security reasons.

• Server: s59.hekko.net.pl
• Database name: truex2_kuba
• Database table: barcode

Code:

private void druk_Click(object sender, EventArgs e)
{
    SqlConnection con = new SqlConnection();
    con.ConnectionString = "DataSource=s59.hekko.net.pl; Initial Catalog=username; Integrated security=true";
    con.Open();

    SqlCommand cmd = new SqlCommand();
    cmd.CommandText = "insert into [barcode]values(@class, @tree, @type, @amount, @length, @width, @square)";

    cmd.Parameters.AddWithValue("@class", klasa.Text);
    cmd.Parameters.AddWithValue("@tree", gatunek.Text);
    cmd.Parameters.AddWithValue("@type", rodzaj.Text);
    cmd.Parameters.AddWithValue("@amount", amount.Text);
    cmd.Parameters.AddWithValue("@length", length.Text);
    cmd.Parameters.AddWithValue("@width", width.Text);
    cmd.Parameters.AddWithValue("@square", textBox1.Text);

    int a = cmd.ExecuteNonQuery();

    if (a > 0)
    {
        MessageBox.Show("Zapisane do raportu");
    }
}

Answer 1

Two things:

• Initial Catalog should be set to your database name, not a username. Since you have set Integrated Security=true there is no need to pass in a username or password in your connection string - it will use the user account that is running in the context of your app.
• The Data Source property should be Data Source

Data Source=s59.hekko.net.pl; Initial Catalog= truex2_kuba; Integrated security=true

Answer 2

string connectionString = GetConnectionString();
static private string GetConnectionString()
{
    return "Data Source = s59.hekko.net.pl; Initial Catalog = truex2_kuba; Integrated security=true";
}

private void druk_Click(object sender, EventArgs e)
{
    string queryString = "INSERT INTO [dbo].[barcode] ([ColumnNameForClassinbarcodeTable],[ColumnNameForTreeinbarcodeTable],[ColumnNameForTypeinbarcodeTable],[ColumnNameForAmountinbarcodeTable],[ColumnNameForLengthinbarcodeTable],[ColumnNameForWidthinbarcodeTable],[ColumnNameForSquareinbarcodeTable]) VALUES (@class, @tree, @type, @amount, @length, @width, @square)";
    using (SqlConnection sqlConnection = new SqlConnection(connectionString))
    using (SqlCommand sqlCommand = new SqlCommand(queryString, sqlConnection))
    {
        try
        {
            //This example assumes all the columns are varchar(500) in your database table design, you may
            //likewise modify these to SqlDbType.Float, SqlDbType.DateTime etc. based on your design

            sqlCommand.Parameters.Add("@class", SqlDbType.VarChar, 500).Value = klasa.Text;
            sqlCommand.Parameters.Add("@tree", SqlDbType.VarChar, 500).Value = gatunek.Text;
            sqlCommand.Parameters.Add("@type", SqlDbType.VarChar, 500).Value = rodzaj.Text;
            sqlCommand.Parameters.Add("@amount", SqlDbType.VarChar, 500).Value = amount.Text;
            sqlCommand.Parameters.Add("@length", SqlDbType.VarChar, 500).Value = length.Text;
            sqlCommand.Parameters.Add("@width", SqlDbType.VarChar, 500).Value = width.Text;
            sqlCommand.Parameters.Add("@square", SqlDbType.VarChar, 500).Value = length.Text;

            sqlCommand.CommandType = CommandType.Text;
            sqlConnection.Open();
            int i = sqlCommand.ExecuteNonQuery();
            sqlConnection.Close();

            if (i != 0)
            {
                MessageBox.Show("Successful Insert.", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }

            else
                MessageBox.Show("Error.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }

        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }

    }
}