Question : combobox Winform cannot bind to valuemember

Hi I have a Dataset of studentData

I make a subset of Active Students into a different Dataset... Original dataset bound , I have no problems

I try binding this Dataset to the combo. It fails to bind.

If I bind the Original Dataset(dsStudents) to the combo its fine. It only fails if i bind it to subset At valueMember property

dim dssubset = new dsSubset(); //Subset Dataset

DataRow[] rows = DsSTUDENTS.Tables[0].Select("Active=1"); //Original Dataset

dssubset = MakeDataSet(rows); //to make subset of original dataset

public DataSet MakeDataSet(DataRow[] drRows)
{
DataTable dt = new DataTable();
foreach (DataRow dr in drRows)
{
dt.ImportRow(dr);
}
DataSet dsNew = new DataSet();
dsNew.Tables.Add(dt);
return dsNew;

}

////// THIS WORKS FINE ////////////////////
this.COMBOBOX.DataSource = dsStudents.Tables[0];
this.ComboBox.DisplayMember = "Name";
this.combobox.ValueMember = "Student_ID";

//////////////////////////FAILS HERE SUBSET OF ORIGINAL DATASET

this.COMBOBOX.DataSource = dssubset.Tables[0];
this.ComboBox.DisplayMember = "Name";
this.combobox.ValueMember = "Student_ID"; //FAILS HERE SAYING CANNOT BIND TO DATAMEMBER

Answer : combobox Winform cannot bind to valuemember

instead of using .Select()
try use DsSTUDENTS.Tables[0].DefaultView.RowFilter Property

try this code

1:
2:
3:
4:
5:
6:
7:



DataView dvActive = DsSTUDENTS.Tables[0].DefaultView;
dvActive.RowFilter = "Active=1";
 
 
this.ComboBox.DataSource = dvActive;
this.ComboBox.DisplayMember = "Name";
this.combobox.ValueMember = "Student_ID";

Open in New Window

Select All