Casting Objects from COM

Question

I am having a problem trying to cast an object to an Array. I am trying to extract data from a log file and am using a library that came with another application. There is no documentation so I am trying to figure out how to extract the data. I have got it to the point where I can create an object using their library file and I can trace through using the debug I can see the data. I am just having a problem trying to cast it into a string array to use. I am not sure of the original data type because I do not have the documentation. I have tried to cast it in a few different ways with no success.
Any help is appreciated, thanks
Peter

Peter · Answer

Thanks for the reply Sam. I think I just figured it out. I did the following and was able to get the data out: Peter obj2 = test.GetFromTo( "Devices.Logical.SOURCES.Si2H6_2.Current Value" , null , null , null ); Array arrayData = ( Array )obj2; objTime = arrayData.GetValue(0); //Time objData = arrayData.GetValue(1); //values Array arrayValue = ( Array )objData; Array arrayTime = ( Array )objTime; String TempValue = "" ; String TempTime = "" ; for ( int i = 0; i { objValue = arrayValue.GetValue(i); objTime = arrayTime.GetValue(i); TempValue = TempValue + Environment .NewLine + objValue.ToString(); TempTime = TempTime + Environment .NewLine + objTime.ToString(); textBox2.Text = i.ToString(); } textBox1.Text = TempValue; textBox3.Text = TempTime;

Sam Hobbs · Answer

You probably are thinking of casting as something that converts data, but it does not always convert data. Casting normally works only when the data is already in the format that is being cast to. So I think you need to write code that does the conversion. You need to write a loop (using foreach or for or something like that) to get each item in the array and then creates a new array with each item converted.

Casting Objects from COM

Answers (2)