c# - Using textbox value for a class -


i'm trying use textbox value form class insert items database. tried creating instance of form1 name of form want value returns 0 items database when click submit button there anyway this?

public void insert()     {         form1 mform = new form1();         string query = "insert parts (item_id, description, brand, model, color, quantity) values('0', '"                + mform.description.text                  + "','" + mform.brand.text                 + "','" + mform.model.text                 + "','" + mform.color.text                 + "','" + mform.quantity.text + "')";          if (this.openconnection() == true)         {            mysqlcommand cmd = new mysqlcommand(query, connection);                        cmd.executenonquery();                            this.closeconnection();         }     }

when instantiate new instance of form1() object, assuming new instance's "description, brand, model, color , quantity" textbox's contains text? default value of textbox.text default value of string property type, null.

ideally, take values user has populated form instance , pass them db so:

public void insert() {     using (var mform = new form1())     {         // ensure user entered values...         if (mform.showdialog() == dialogresult.ok)         {             string query = "insert parts (item_id, description, brand, model, color, quantity) values('0', '"                + mform.description.text                + "','" + mform.brand.text                + "','" + mform.model.text                + "','" + mform.color.text                + "','" + mform.quantity.text + "')";              if (this.openconnection() == true)             {                var cmd = new mysqlcommand(query, connection);                cmd.executenonquery();                this.closeconnection();             }         }     } }

additionally, should avoid inline sql , instead use stored procedures, or @ least use sqlparameter's.


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