internal static NamedArrayList UpdateDropDownList(
NamedArrayList array, string str)
{
if (str == null) // if no string, do nothing
return array;
str = str.Trim(); // remove whitespace from beginning and end
if (str.Length == 0) // if no string, do nothing
return array;
int index = array.IndexOf(str); // find if already in list
if (index != -1) // if already in list,
array.RemoveAt(index); // remove it, and
array.Insert(0, str); // insert it at head of list
return array; // return the updated list
}
internal static void SaveValuesToApplicationDataFolder(
NamedArrayList[] arrayOfArrayList, string filename)
{
if (arrayOfArrayList == null || arrayOfArrayList.Length == 0)
return;
try
{
XmlTextWriter xmlwriter =
OpenApplicationDataFileWriter("configuration", filename);
if (xmlwriter == null)
return;
foreach(NamedArrayList array in arrayOfArrayList)
{
if (array == null || array.Count == 0)
continue;
xmlwriter.WriteStartElement("list");
xmlwriter.WriteAttributeString("name", array.Name);
//xmlwriter.WriteEndAttribute();
int i = 0;
foreach (string s in array)
{
if (++i > 10) // limit to last 10 items
break;
xmlwriter.WriteElementString("value", s);
} // end foreach through strings
xmlwriter.WriteEndElement();
} // end foreach through arrays
CloseApplicationDataFileWriter(xmlwriter);
} // end try
catch(Exception) // don't let SecurityException stop us
{} // no dropdown list is not a critical error
}
internal static NamedArrayList UpdateDropDownList(
NamedArrayList array, Control ctrl)
{
return UpdateDropDownList(array, ctrl.Text);
}
internal static void LoadValuesFromApplicationDataFolder(
NamedArrayList[] arrayOfArrayList, string filename)
{
NamedArrayList valuelist = null;
if (arrayOfArrayList == null || arrayOfArrayList.Length == 0)
return;
try
{
XmlTextReader xmlreader =
OpenApplicationDataFileReader(filename);
if (xmlreader == null)
return;
while(xmlreader.Read())
{
switch (xmlreader.NodeType)
{
case XmlNodeType.Element:
if (xmlreader.HasAttributes)
{
valuelist = null;
string listname = xmlreader[0];
foreach(NamedArrayList array
in arrayOfArrayList)
{
if (listname.Equals(array.Name))
{
valuelist = array;
break;
}
} // end foreach
} // end if
break;
case XmlNodeType.Text:
if (valuelist == null)
break;
string str = xmlreader.Value;
valuelist.Add(str);
break;
} // end switch
} // end while
CloseApplicationDataFileReader(xmlreader);
} // end try
catch(Exception) // don't let SecurityException stop us
{ // no dropdown list is not a critical error
}
}
