I am stuck in something. I want to convert this object, which is a array of objects, into a array of strings I cannot find a good way to do that. Do I need to use a for loop? If someone can also tell me why these 2 methods failed, I will appreciate.
object greetings = new object[] { "hi", "hello", "greetings" };
if (greetings.GetType().IsArray)
{
//string[] arr = greetings as string[];
//string[] arr = (string[])greetings;
}
string[] arr = Array.ConvertAll((object[])greetings, Convert.ToString);
Convert.ToString is about converting (i.e. changing one type to another) - this answer does work, which is great, but it is a strange way to attack the problem. What you want here is casting (since the data in the array is already a string).
Convert.ToString is just a convenient thing to use here, and when work on string object it returns itself. @mjwills if you face the dilemma of the word Convert, then you can define another, like obj => (string)objIf you want to include only objects that are strings:
string[] result = greetings.OfType<string>().ToArray();
If you want to include everything (non-strings throw an exception):
string[] result = greetings.Cast<string>().ToArray();
object result=new object();
.....
object[] sampleArr =(object[]) result; //change object as array
foreach(var m in sampleArr)
{
string str = (string )m; //read out array
}
try this.
object[] objArray = { "A", "B", "C" };
string[] strArray = objArray.Cast<string>().ToArray();
//2.
object[] objArray2 = { "A", null, 1, false };
foreach (object obj in objArray2)
{
if (obj != null)
{
if (obj.GetType() == typeof(string))
{
//strings values in here
}
}
}
var asArray = ((object[])greetings).Cast<string>().ToArray()greetingsto an array of strings is not valid. You don't have an array of strings. You have an array of objects (where all of the objects happen to be strings).