/// <summary>
/// Retrieves the text of a list-view item.
/// </summary>
/// <param name="index">Index of the desired item of which to retrieve the text.</param>
public string GetItemText(int index)
{
string text = "";
using (var memory = new ControlMemory(Window, Marshal.SizeOf(typeof(User32.ListViewItem))))
{
// TODO: Any way of knowing the maximum length of item text here?
// Trial and error might be needed, trying a bigger buffer when the whole string is not retrieved:
// http://forums.codeguru.com/showthread.php?351972-Getting-listView-item-text-length;
var stringBuffer = new ControlMemory(Window, Constants.MaximumPathLength * 2);
var itemData = new User32.ListViewItem
{
TextMax = Constants.MaximumPathLength,
Text = stringBuffer.Address
};
memory.Write(itemData);
int length = (int)SendMessage(Message.GetItemText, new IntPtr(index), memory.Address);
itemData = memory.Read <User32.ListViewItem>();
if (length > 0)
{
byte[] textBuffer = stringBuffer.Read <byte>(length * 2);
text = Encoding.Unicode.GetString(textBuffer);
}
stringBuffer.Dispose();
}
return(text);
}
/// <summary>
/// Writes a structure of a given type to a memory address allocated by this function, and subsequently use it.
/// </summary>
/// <typeparam name="T">The type of the structure to read.</typeparam>
/// <param name="toWrite">The structure to write to memory.</param>
/// <param name="useMemory">Method using the pointer in memory where the written object is located.</param>
internal void WriteToAddress <T>(T toWrite, Action <IntPtr> useMemory)
where T : struct
{
using (var memory = new ControlMemory(Window, Marshal.SizeOf(typeof(T))))
{
memory.Write(toWrite);
useMemory(memory.Address);
}
}
/// <summary>
/// Read a structure of a given type from a memory address allocated by this function, but filled by the caller.
/// </summary>
/// <typeparam name="T">The type of the structure to read.</typeparam>
/// <param name="fillMemory">Fills up the memory at the provided address, from which the structure will be read.</param>
/// <returns>The read structure from the memory address.</returns>
internal T ReadFromAddress <T>(Action <IntPtr> fillMemory)
where T : struct
{
using (var memory = new ControlMemory(Window, Marshal.SizeOf(typeof(T))))
{
fillMemory(memory.Address);
return(memory.Read <T>());
}
}