您应该使用以下内容:
private void BindData()
{
bs = new BindingSource();
bs.DataSource = _Supplier.Select();
gcSupplier.DataSource = bs;
txtCode.DataBindings.Add("Text", bs, colCode.FieldName);
txtName.DataBindings.Add("Text", bs, colName.FieldName);
txtAddress.DataBindings.Add("Text", bs, colAddress.FieldName);
txtNationalCode.DataBindings.Add("Text", bs, colNationalCode.FieldName);
txtEconomicCode.DataBindings.Add("Text", bs, colEconomicCode.FieldName);
txtPostalCode.DataBindings.Add("Text", bs, colPostalCode.FieldName);
txtTelNumber.DataBindings.Add("Text", bs, colTelNumber.FieldName);
txtFaxNumber.DataBindings.Add("Text", bs, colFaxNumber.FieldName);
txtMobileNumber.DataBindings.Add("Text", bs, colMobileNumber.FieldName);
txtEmail.DataBindings.Add("Text", bs, colEmail.FieldName);
luePersonType.DataBindings.Add("EditValue", bs, colPersonType_Id.FieldName);
lueState.DataBindings.Add("EditValue", bs, colState_Id.FieldName);
lueCity.DataBindings.Add("EditValue", bs, colCity_Id.FieldName);
}