Cannot open database “pubs” requested by the login. The login failed. Login failed for user 'ESLAM\Eslam_Nora'

Question

Hello iam trying to store sum information inside a SQL Server table , but when i run the form and turned to store the data the above runtime error appears also the the pubs database icon in SQL Server is missing the (+) sign how come ! , i wrote that code for inserting , Thanks in advance.

public partial class Add_Client : Form
{

    SqlConnection clientConnection;
    string connString;
    SqlCommand insertCommand; 

   public Add_Client()
    {
        InitializeComponent();
        connString = "Data Source=.\\INSTANCE2;Initial Catalog=pubs; Integrated security=true ";
        clientConnection = new SqlConnection();
        clientConnection.ConnectionString = connString;
    }

    private void button1_ADD(object sender, EventArgs e)
    {
         try
        {

            SqlCommand insertCommand = new SqlCommand();
            insertCommand.Connection = clientConnection;
            insertCommand.CommandText = "INSERT INTO Client_Data values(@Client_Name,@Autorization_No,@Issue_Type,@Status)";
            insertCommand.Parameters.Add("@Client_Name", SqlDbType.NVarChar, 60).Value = txt_Name.Text;
            insertCommand.Parameters.Add("@Autorization_No", SqlDbType.Int, 60).Value = txt_Auth.Text.ToString();
            insertCommand.Parameters.Add("@Issue_Type", SqlDbType.Text, 200).Value = txt_Iss.Text;
            insertCommand.Parameters.Add("@Status", SqlDbType.Text, 200).Value = txt_Iss.Text;
            //insertCommand.Parameters.Add("@Date To Memorize", SqlDbType.Date, 15).Value=Ca_Mem.se;
            insertCommand.Connection.Open();
            insertCommand.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            throw ex;

        }
        finally
        {
            if (clientConnection != null)
            {
                clientConnection.Close();
            }

        }
        }
}

Answer 1

You use integrated security to access the database. Therefore your windows user needs to be authorized to access the database. Check the security settings for the server and the database.