Bonnie,
Thanks for the code. It's nice to be able to copy and paste it without translating it.
It seems oReflection.InstantiateClass is passing back a null value. I suspect it has something to do with the assembly and classname parameters I am passing in. Would the assembly parameter be the path to the .dll file?
>Hi Mike,
>
>I've posted this before, but I didn't bother searching for the post. Here's a repeat:
>
>Below is a simplified version of my Reflection class (other things could be added to it, for example allowing parameters to be passed).
>
>It's easy to use too. Here's one way to use it:
>
>MyReflectionClass oReflection = new MyReflectionClass(assembly, classname);
>string message = "";
>object o = oReflection.InstantiateClass(ref message);
>if (message != "")
> MessageBox.Show(message);
>else
>{
> // go on with your processing
>}
>>
>And here's the simplified class:
>
>
>public class MyReflectionClass
>{
> #region Declarations
> private string m_AssemblyName;
> private string m_ClassName;
> #endregion
>
> #region Constructors
> public MyReflectionClass()
> {
> }
> public MyReflectionClass(string assemblyName, string className)
> {
> this.AssemblyName = assemblyName;
> this.ClassName = className;
> }
> #endregion
>
> #region Methods
>
> public Assembly LoadAssembly(ref string Message)
> {
> Assembly oAssembly = null;
>
> try
> {
> oAssembly = Assembly.LoadFrom(this.m_AssemblyName + ".DLL");
> }
> catch (System.IO.FileNotFoundException)
> {
> Message = this.m_AssemblyName + " could not be found at the specified URL!" + (char)13 + (char)13 +
> "Check that you have correctly entered the component URL and that your network or Internet " +
> "connection is functioning correctly.";
> return oAssembly;
> }
> catch (System.BadImageFormatException)
> {
> Message = this.m_AssemblyName + " is invalid or damaged!" + (char)13 + (char)13 +
> "Contact your system administrator.";
> return oAssembly;
> }
> catch (System.Exception ex)
> {
> Message = ex.Message;
> return oAssembly;
> }
>
> return oAssembly;
> }
>
> public object InstantiateClass(ref string Message)
> {
> Assembly oAssembly = null;
> return this.InstantiateClass(ref oAssembly, ref Message);
> }
> public object InstantiateClass(ref Assembly oAssembly, ref string Message)
> {
> object oClass = null;
> if (oAssembly == null || oAssembly.FullName.Contains(this.m_AssemblyName) == false)
> oAssembly = this.LoadAssembly(ref Message);
>
> try
> {
> // Create an instance of the desired type from the assembly
> if (oAssembly != null)
> oClass = oAssembly.CreateInstance(this.m_ClassName);
> }
> catch (Exception ex)
> {
> Message = ex.Message;
> return oClass;
> }
>
> return oClass;
> }
>
> #endregion
>
> #region Properties
> public string AssemblyName
> {
> get { return this.m_AssemblyName; }
> set
> {
> this.m_AssemblyName = value.Trim();
> if (this.m_AssemblyName.ToUpper().EndsWith(".DLL", true, null))
> this.m_AssemblyName = this.m_AssemblyName.Remove(this.m_AssemblyName.Length - 4);
> }
> }
> public string ClassName
> {
> get { return this.m_ClassName; }
> set
> {
> this.m_ClassName = value.Trim();
> if (this.m_ClassName.Contains(this.m_AssemblyName) == false)
> this.m_ClassName = this.m_AssemblyName + "." + this.m_ClassName;
> }
> }
> #endregion
>}
>>
>~~Bonnie
