c# - How to bind CheckBoxes from GridView to source DataTable? -

i have create form, in users can create multiple tests data. if user want validate data, must check checkbox in appropiate row , column test , then, click button titled "validate tests". if user want add new test (i.e. test2), must press "add test" button.

all data stored datatable (dttests) , displaying gridview (dgvtests) on aspx page.

my question is, how can checked-values each checkboxes ?

example website: in example, user add 2 tests (look on image: http://i.stack.imgur.com/cr8l5.jpg).

• in test1, want validate years: 1990, 1993, 1999
• in test2, want validate years: 1990, 1993, 1998, 1999

new test column in dttests:

datacolumn dc = new datacolumn("test" + i.tostring()) {     datatype = typeof(boolean),     readonly = false     }; dttests.column.add(dc); 

i add new testx column gridview in way:

templatefield cbxtest = new templatefield(); cbxtest.headertemplate = new checkboxtemplate(datacontrolrowtype.header, "test" + i.tostring(), "test" + i.tostring()); cbxtest.itemtemplate = new checkboxtemplate(datacontrolrowtype.datarow, "test" + i.tostring(), "test" + i.tostring()); dgvtests.columns.add(cbxtest); 

here's class checkboxtemplate:

public class checkboxtemplate : itemplate     {         private datacontrolrowtype templatetype;         private string columnname;         private string bindname;          public checkboxtemplate(datacontrolrowtype _type, string _colname, string _bindname)         {             templatetype = _type;             columnname = _colname;             bindname = _bindname;         }          public void instantiatein(control container)         {             switch (templatetype)             {                 case datacontrolrowtype.header:                     literal lc = new literal() { text = string.format("<b>{0}</b>", columnname) };                     container.controls.add(lc);                     break;                  case datacontrolrowtype.datarow:                     checkbox cbx = new checkbox();                     cbx.databinding += new eventhandler(this.cbx_databinding);                     container.controls.add(cbx);                     break;                 default:                     break;             }         }          private void cbx_databinding(object sender, eventargs e)         {             checkbox cbx = (checkbox)sender;             gridviewrow row = (gridviewrow)cbx.namingcontainer;             cbx.checked = convert.toboolean(databinder.eval(row.dataitem, bindname).tostring());         }     } 

here how can go it, first assign id checkboxes cbx.id = "cbxdotest.

then add rowcommand event handler triggered when validate tests button clicked. here need traverse e.row.cells properties, if cell belonged test column search on checkbox control (checkbox cbx = e.row.cell[i].findcontrol("cbxdotest"); check if cbx.checked true or false.

i wrote flow , how head double check method/property names.