Must declare the scalar variable "@".

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SqlCommand com = new SqlCommand("INSERT INTO Regstudents (სახელი, გვარი,[სტუდენტური ნომერი],[სასწავლო კურსი], [ტელეფონის ნომერი]) VALUES (@სახელი, @გვარი, @[სტუდენტური ნომერი], @[სასწავლო კურსი], @[ტელეფონის ნომერი])");
com.CommandType = CommandType.Text;
com.Connection = con;
com.Parameters.AddWithValue("@სახელი", textBox1.Text);
com.Parameters.AddWithValue("@გვარი", textBox2.Text);
com.Parameters.AddWithValue("@[სტუდენტური ნომერი]", textBox3.Text);
com.Parameters.AddWithValue("@[სასწავლო კურსი]", textBox4.Text);
com.Parameters.AddWithValue("@[ტელეფონის ნომერი]", textBox5.Text);
con.Open();
com.ExecuteNonQuery();

Posted 4-Jun-15 6:28am

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Duncan Edwards Jones · Answer 1 · 2015-06-04T07:40:00

Square brackets around parameter names are not legal

Can you try take the space out of the parameter name and then remove the brackets?

e.g.

SqlCommand com = new SqlCommand("INSERT INTO Regstudents (სახელი, გვარი,[სტუდენტური ნომერი],[სასწავლო კურსი], [ტელეფონის ნომერი]) VALUES (@სახელი, @გვარი, @სტუდენტური_ნომერი, @სასწავლო_კურსი, @ტელეფონის_ნომერი)");
com.CommandType = CommandType.Text;
com.Connection = con;
com.Parameters.AddWithValue("@სახელი", textBox1.Text);
com.Parameters.AddWithValue("@გვარი", textBox2.Text);
com.Parameters.AddWithValue("@სტუდენტური_ნომერი", textBox3.Text);
com.Parameters.AddWithValue("@სასწავლო_კურსი", textBox4.Text);
com.Parameters.AddWithValue("@ტელეფონის_ნომერი", textBox5.Text);
con.Open();
com.ExecuteNonQuery();