ASP.Net将数据从Textbox插入数据库

Question

我试图将数据从文本框插入我的数据库,它给我一个例外.

异常详细信息:System.Data.SqlClient.SqlException:'test'附近的语法不正确.

在我提交代码之前的一些细节:我的数据库叫:电影我的表数据叫:用户和我有列,如:"FirstName","LastName"等...

protected void Register_Click(object sender,EventArgs e){SqlConnection connection = new SqlConnection("Data Source = MICROSOF-58B8A5\SQL_SERVER_R2; Initial Catalog = Movie; Integrated Security = True");

        connection.Open();
        //FirstName***********
        string firstName = FirstNameTextBox.Text;
        string sqlquery = ("INSERT INTO [Users] (FirstName) VALUES (' " +FirstNameTextBox.Text + " ' ");

        SqlCommand command = new SqlCommand(sqlquery , connection);
        command.Parameters.AddWithValue("FirstName", firstName);
        //LastName************
        string lastName = LastNameTextBox.Text;
        sqlquery = ("INSERT INTO [Users] (LastName) VALUES (' " + LastNameTextBox.Text+ " ' ");
        command.Parameters.AddWithValue("LastName", lastName);
        //Username*************
        string username = UsernameTextBox.Text;
        sqlquery = ("INSERT INTO [Users] (Username) VALUES (' " + UsernameTextBox.Text+ " ' ");
        command.Parameters.AddWithValue("UserName", username);
        //Password*************
        string password = PasswordTextBox.Text;
        sqlquery = ("INSERT INTO [Users] (Password) VALUES (' " + PasswordTextBox.Text + " ' ");
        command.Parameters.AddWithValue("Password", password);
        if (PasswordTextBox.Text == ReTypePassword.Text)
        {
            command.ExecuteNonQuery();
        }
        else
        {
            ErrorLabel.Text = "Sorry, You didnt typed your password correctly.  Please type again.";
        }

        connection.Close();
    }

Answer 1

使用一个查询并使用@ParamName:

    string sqlquery = "INSERT INTO [Users] (FirstName,LastName,UserName,Password) VALUES (@FirstName,@LastName,@UserName,@Password)";
    SqlCommand command = new SqlCommand(sqlquery , connection);

    //FirstName***********
    string firstName = FirstNameTextBox.Text;
    command.Parameters.AddWithValue("FirstName", firstName);
    //LastName************
    string lastName = LastNameTextBox.Text;     
    command.Parameters.AddWithValue("LastName", lastName);
    //Username*************
    string username = UsernameTextBox.Text;     
    command.Parameters.AddWithValue("UserName", username);
    //Password*************
    string password = PasswordTextBox.Text;    
    command.Parameters.AddWithValue("Password", password);

    ...........