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.NET Forum / Languages / VB.NET / April 2007Name of type to class instance?
Is it possible to create an object of a specific type just by knowing its name as a text string? Say I have the string System.Windows.Forms.Textbox how would I go about turing that string into an object of that type? I think its possible with reflection, but not sure how... thanks! > Is it possible to create an object of a specific type just by knowing its > name as a text string? Almost certainly. > I think its possible with reflection, but not sure how... As soon as you start reaching for the Reflection tool box, take a step back and ask yourself if there's not a better way to do what you need. What is it that you want to achieve? (never mind how, for now) Regards, Phill W. Well we know for certain we have to create objects on the fly based off of a type name specified in a database row... so right now we have the object type... just need to create the object >> Is it possible to create an object of a specific type just by knowing its >> name as a text string? [quoted text clipped - 10 lines] > Regards, > Phill W. > Well we know for certain we have to create objects on the fly based off of a > type name specified in a database row... so right now we have the object [quoted text clipped - 14 lines] > > Regards, > > Phill W. In addition to the others, if you are using serializable controls you can store the searilized data into the database and then deserialize the data back into the control. This way you don't have to worry about setting all the properties. Thanks, Seth Rowe > Well we know for certain we have to create objects on the fly based off of a > type name specified in a database row... so right now we have the object > type... just need to create the object Ah ha! That's one of the Good Reasons for doing this. As Tom said, Type.GetType and Activator.CreateInstance. This will work well for Framework-defined Types but watch out when you start trying to use Types defined in /your own/ assemblies - whatever process is doing all this has to be able to "get hold of" (i.e. Load) the defining Assemblies. Can make for some fun deployment issues. HTH, Phill W. > Is it possible to create an object of a specific type just by knowing its > name as a text string? Say I have the string > > System.Windows.Forms.Textbox how would I go about turing that string into an > object of that type? I think its possible with reflection, but not sure > how... thanks! Topics to look at in the documentation: Type.GetType Activator.CreateInstance That should be enought to get you started. -- Tom Shelton awesome, thanks! >> Is it possible to create an object of a specific type just by knowing its >> name as a text string? Say I have the string [quoted text clipped - 13 lines] > -- > Tom Shelton Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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