/// <summary>
/// Gets the value of the data item specific to each datasource.
/// </summary>
/// <param name="dataItem">The data item.</param>
/// <param name="field">The field bound to this data item.</param>
/// <returns>Value or null</returns>
public override object GetValue(TItem dataItem, IAdapterBoundField field)
{
object result = null;
if (!String.IsNullOrEmpty(field.DataField))
{
DataRow row = dataItem as DataRow;
result = row.IsNull(field.DataField) ? null : row[field.DataField];
}
return(result);
}
private object GetRowValue(TItem item, IAdapterBoundField boundField)
{
object result = _adapter.GetValue(item, boundField);
if (result == null)
{
if (boundField.ConvertNullToEmptyString)
{
result = String.Empty;
}
}
else
{
if (!String.IsNullOrEmpty(boundField.DataFormatString))
{
result = String.Format(boundField.DataFormatString, result);
}
}
return(result);
}
/// <summary>
/// Gets the value of the data item specific to each datasource.
/// </summary>
/// <param name="dataItem">The data item.</param>
/// <param name="field">The field bound to this data item.</param>
/// <returns>Value or null</returns>
public virtual object GetValue(TItem dataItem, IAdapterBoundField field)
{
return(dataItem);
}
/// <summary>
/// Returns the value of a data item, give the adapter field.
/// </summary>
/// <param name="dataItem">data item</param>
/// <param name="field">adapter field interface</param>
/// <returns>Value of the data item</returns>
public override object GetValue(TItem dataItem, IAdapterBoundField field)
{
IDataReader reader = dataItem as IDataReader;
return(reader.IsDBNull(reader.GetOrdinal(field.DataField)) ? null : reader[field.DataField]);
}
/// <summary>Gets the value of the data item from the data source. </summary>
/// <param name="dataItem">The data item.</param>
/// <param name="field">Adapter field bound to this item.</param>
/// <returns>Value or null.</returns>
public override object GetValue(TItem dataItem, IAdapterBoundField field)
{
return(String.IsNullOrEmpty(field.DataField) ? null : DataBinder.Eval(dataItem, field.DataField));
}
