Getting data from sql table inside a GridView (C#) -

i've got gridview made in asp.net. want fill method. doesn't work. return() doesn't work , getdata inside page_load underlined red(compiler error cs1501).

 public partial class pages_gridview1 : system.web.ui.page {      protected void page_load(object sender, eventargs e)     {         getdata();     }       public string getdata(chart chart)     {          string connstr = configurationmanager.connectionstrings["crm_sql"].connectionstring;         sqlconnection conn = new sqlconnection(connstr);         conn.open();         sqlcommand query = new sqlcommand(chart.sql, conn);         sqldatareader rst = query.executereader();           gridview1.datasource = rst;         gridview1.databind();         return gridview1();      } } 

you calling getdata() method without parameters , in method definition using getdata(chart chart). plus returning string in method definition!!

method call : getdata()
method definition : public string getdata(chart chart)

method call , definition should match

now should :

protected void page_load(object sender, eventargs e) {     getdata(); }   public void getdata() {     chart chart = new chart();     string connstr = configurationmanager.connectionstrings["crm_sql"].connectionstring;     sqlconnection conn = new sqlconnection(connstr);     conn.open();     sqlcommand query = new sqlcommand(chart.sql, conn);     sqldatareader rst = query.executereader();       gridview1.datasource = rst;     gridview1.databind();   } 

note : assuming setting sql query in chart class