Filtering on template list with property name as string

Question

Hi I have to apply filter on generic class. The sample class is as follows

public class Sample
{
    List sourceList = new List();         


        

Answer 1

Here I give you a sample example how to implement filtering using LINQ on List items..

public class clsCountry
{
    public string _CountryCode;
    public string _CountryName;
    //
    public clsCountry(string strCode, string strName)
    {
        this._CountryCode = strCode;
        this._CountryName = strName;
    }
    //
    public string CountryCode
    {
        get {return _CountryCode;}
        set {_CountryCode = value;}
    }
    //
    public string CountryName
    {
        get { return _CountryName; }
        set { _CountryName = value; }
    }
}

Now, lets create a list of objects based on class clsCountry and store them in a List object.

List lstCountry = new List();
lstCountry.Add(new clsCountry("USA", "United States"));
lstCountry.Add(new clsCountry("UK", "United Kingdom"));
lstCountry.Add(new clsCountry("IND", "India"));

Next, we shall bind the List object lstCountry to a DropDownList control named drpCountry as like as:

drpCountry.DataSource = lstCountry;
drpCountry.DataValueField = "CountryCode";
drpCountry.DataTextField = "CountryName";
drpCountry.DataBind();

Now, use LINQ to filter data from the lstCountry object and bind the filtered list to the dropdown control drpCountry.

 var filteredCountries = from c in lstCountry
                        where c.CountryName.StartsWith("U")
                        select c;

drpCountry.DataSource = filteredCountries;
drpCountry.DataValueField = "CountryCode";
drpCountry.DataTextField = "CountryName";
drpCountry.DataBind();

Now the dropdown control will have only 2 items

United States
United Kingdom
Now apply those techniques on your case..