July 2008 Archives

/// <summary>
/// Converts NULL values to String.Empty in any object
/// </summary>
/// <param name="o"></param>
public static void ConvertNullToEmptyString(object o) {
    Type stringType = typeof(String);

    var q = from n in o.GetType().GetProperties()
                    where n.PropertyType == stringType
                    select n;

    foreach (PropertyInfo p in q)
        if (p.GetValue(o, null) == null)
            p.SetValue(o, String.Empty, null);

The above code is a little function that I wrote that converts all NULL string references in an object to String.Empty.  Don’t forget to add in a Reflection using statement.

public myTestClass myTestClass() {
    myTestClass n = new myTestClass();
    //    ?Get from Database?
    n.string_1 = null;
    n.string_2 = "Hello";

    //    Convert null values

    //    Return the new object
    return n;
/// <summary>
///    Simple class
/// </summary>
public class myTestClass {
    public string string_1 { get; set; }
    public string string_2 { get; set; }

This example shows how it could be used.  This way, when running a JSON based webservice, the data returned van be filtered through ConvertNullToEmptyString and that will make JavaScript much happier, rather than having to deal with … “string_1” : "null, … we get a : “”, which is then immediately usable.

- Matthew

About this Archive

This page is an archive of entries from July 2008 listed from newest to oldest.

June 2008 is the previous archive.

December 2008 is the next archive.

Find recent content on the main index or look in the archives to find all content.