Question

I’m trying to convert some code that uses datasets to LINQ. Some of the code passes column names into other functions as strings.

Is there anyway I can easily rewrite this into LINQ?

string s = getElement(tr, elementName);  private string getElement (tableRow re, string elementName){     if(tr[elementName] != null){        return tr[elementName].toString()     } } 

OR:

private void copy (tableRow trFrom, tableRow trTo){    foreach (DataColumn c in trFrom.Table.Columns) {         trTo[c.ColumnName] = trFrom[c.ColumnName];    } } 

Answer to GVS: The reason to convert to LINQ is because it in many situations are easier to code LINQ and get better performance. It’s related to another question here on stackoverflow: programming pattern using typed datasets

The reason I need to use the column name as a string is mainly because the column names are passed as a ID for input fields, they are then sent back to the program using AJAX (jquery).

Answer 1

The answer is to use reflection.

Getting a value

private string getElement (tableRow tr, string element){     string val = '';     try     {         val = tr.GetType().GetProperty(element).GetValue(tr, null).ToString();     }     catch //NULL value     {         val = '';     } } 

Or the copy scenario:

foreach (PropertyInfo c in tr.GetType().GetProperties()) {     thr.GetType().GetProperty(c.Name).SetValue(thr,          tr.GetType().GetProperty(c.Name).GetValue(tr, null), null); }