c# - Why does this not work? -

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i have class act variables store data textboxes:

public class business {     int64 _businessid = new int64();     int _businessno = new int();     string _businessname;     string _businessdescription;       public int64 businessid     {        { return convert.toint64(_businessid.tostring()); }     }      public int businessno     {        { return _businessno; }        set { _businessno = value; }     }      public string businessname     {        { return _businessname; }        set { _businessname = value; }     }      public string businessdescription     {        { return _businessdescription; }        set { _businessdescription = value; }     }

i have code store data textbox session , list (there can many businesses uploaded database @ 1 time) - database irrelevent now. want display list of businesses stored session onto gridview: (b = class business)

list<business> businesscollection = new list<business>();  protected list<business> getbusinesses() {    return (list<business>)session["business"]; }  protected void btnrow_click(object sender, eventargs e) {    if (session["business"] != null)       businesscollection = (list<business>)session["business"];     business b = new business();     b.businessno = convert.toint32(txtbno.text);    b.businessname = txtbname.text;    b.businessdescription = txtbdesc.text;     businesscollection.add(b);     gridview1.datasource = getbusiness();    gridview1.databind(); }

it doesn't seem add list gridview, can help?

debug code , ensure if (session["business"] != null) evaluates true.

if false adding list never returned getbusinesss

without more information can rewrite this:

    list<business> businesscollection = new list<business>();      protected list<business> getbusinesses()     {         if (session["business"] == null)              return businesscollection;         else              return (list<business>)session["business"];     }      protected void btnrow_click(object sender, eventargs e)     {                     business b = new business();          b.businessno = convert.toint32(txtbno.text);         b.businessname = txtbname.text;         b.businessdescription = txtbdesc.text;          var currentcollection = getbusinesses();          currentcollection.add(b);          gridview1.datasource = currentcollection;         gridview1.databind();     }

i wouldn't this, seems need assignment session["business"] don't want change logic of code.

update

i wanted update think wanted accomplish.

    protected list<business> getbusinesses()     {         if (session["business"] == null)              session["business"] = new list<business>();         return (list<business>)session["business"];     }      protected void btnrow_click(object sender, eventargs e)     {                     business b = new business();          b.businessno = convert.toint32(txtbno.text);         b.businessname = txtbname.text;         b.businessdescription = txtbdesc.text;          var currentcollection = getbusinesses();          currentcollection.add(b);          gridview1.datasource = currentcollection;         gridview1.databind();     }

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