c# - Creating a smart save button -


i'm designing desktop app using c#.net , mssql. app contains form user can change values in text boxes , press button save them in database. following code calls method update values , insert them database beside shows message box confirms new changes. problem that, user has not change value , press save button message box appear again . tried compare values of text boxes before , after change dose not work. way overcome problem ?

  private void btnsave_click(object sender, eventargs e)     {         int price = convert.toint32(txtprice.text);          classes.prices prices = new classes.prices(combobox1.selectedvalue.tostring(),             convert.toint32(txtprice.text),              convert.toint32(txtcarbohydrate.text),              convert.toint32(txtprotein.text),             convert.toint32(txtfat.text),             convert.toint32(txthumidity.text),              convert.toint32(txtminerals.text));         try {              prices.updatematerialprice();             //this.combobox1.refresh();             this.txtprice.refresh();             int price2 = convert.toint32(txtprice.text);            if (price2 != price)            {                messagebox.show("new price saved!");            }          }             catch(exception ex)         {             throw ex;         }             foreach (control ctrl in this.panel1.controls)             {                 if (ctrl textbox)                 {                     textbox textbx = ctrl textbox;                      if (textbx.readonly == false)                     {                         textbx.readonly = true;                         textbx.backcolor = color.lightblue;                     }                 }             }

the problem price , price2 always have same value since capturing them both @ moment user presses "save" button you'll message box, goes this: user changes price text box user presses "save" button , "btnsave_click" method run, @ point txtprice has value user typed.

i recommend having separate layer data access, use entity framework , ask entity if of values has changed. check these, might you:

entity framework: check if there changes saved specific entity

http://www.codeproject.com/articles/615499/models-poco-entity-framework-and-data-patterns


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