Trying to use Icomparer for finding class in a list.

[tshad]

I want to search on multiple properties in a list to find the correct list
item. I tried using an Icomparer which I use for sorting but not sure how
to call it (if it would even work).

Anyone know how I would change this to work?

***********************************
public class PropertyForeignKey : ForeignKey
{
#region PropertyForeignekey Members

private int propertyType;
private int propertyOrder;

public PropertyForeignKey(string tableName, string foreignKeyName,
decimal foreignKeyValue,
int propertyType,int propertyOrder) : base
(tableName,foreignKeyName,foreignKeyValue)
{
this.propertyType = propertyType;
this.propertyOrder = propertyOrder;
}

public int PropertyType
{
get { return this.propertyType; }
set { this.propertyType = (int)value; }
}

public int PropertyOrder
{
get { return this.propertyOrder; }
set { this.propertyOrder = (int)value; }
}

new public string ToString()
{
return TableName + " / " + ForeignKeyName + " / " +
ForeignKeyValue + " / " + PropertyType + " / " + PropertyOrder;
}
#endregion
}

public class PropertyForeignKeyCollection : List<PropertyForeignKey> { }
public class PropertyForeignKeyComparer : IComparer<PropertyForeignKey>
{
public int Compare(PropertyForeignKey firstInstance,
PropertyForeignKey secondInstance)
{
int result = 0;
result =
firstInstance.TableName.CompareTo(secondInstance.TableName);
if (result != 0) return (result); // if not equal, not need to
check Name
result =
secondInstance.ForeignKeyName.CompareTo(secondInstance.ForeignKeyName);
if (result != 0) return (result);
result =
secondInstance.PropertyType.CompareTo(secondInstance.PropertyType);
if (result != 0) return (result);
result =
secondInstance.PropertyOrder.CompareTo(secondInstance.PropertyOrder);
if (result != 0) return (result);
return result;
}
}
***********************************

Thanks,

Tom

 

[sloan]

Writing "Filters" for Generics:
http://www.scribd.com/doc/2057557/CTG-Articles-Generics
Search for:
Finding an object in a List<> collection



Multiple Property Sorting
http://sholliday.spaces.live.com/Blog/cns!A68482B9628A842A!141.entry


Take a look there, I don't like the IComparer as a Finder.
My blog entry on sorting probably isn't what you're looking for.
Focus on Ludwig's article