Process.waitforexit return code

Select all Open in new window. We value your feedback. Take our survey and automatically be enter to win anyone of the following: Yeti Cooler, Amazon eGift Card, and Movie eGift Card! If you are experiencing a similar issue, please ask a related question. Process.waitforexit Of The Month 28 minutes left to enroll. View June's Free Course. Become a Premium Member and unlock a new, free course in leading technologies each month. WaitForExit returns null reference exception.

I'm writing an app that stores files in a database table varbinary max type. Process.waitforexit storage and retrieval works fine but Code i retrieve jpg and other image files from the database also some mp3's that open with code - which is set as the default app it seems that it returns a null value, causing a Null Reference Exception to be thrown and the program will crash thank God for return Try-Catch!

I've googled for some time and I've found out that the process that its called is the dllhost. Yet it returns null. Now if i change the default application that a file is using in order to open it, it works just fine. The problem is that i do not want to change the default applications, since the application I'm developing is going to be installed in many different PCs, with different users and different preferences.

Below is the code i use to retrieve and open the files Public Sub GetFileFromDB PKVar As String, TableVar As String, IDLocation As String, PersonIDLocation As String 'select file from database Add New SqlParameter " IDLocation", IDLocation.

ToString 'thefilename End With DR. WriteAllBytes myTempFilePath, byteArray Using myProcess As System. Start myTempFilePath ' Wait for the user to close the program editor before continue myProcess. WaitForExit End Using Catch ex As Exception 'MsgBox ex. ReadAllBytes myTempFilePath ' Clean up System. Delete myTempFilePath End Try Dim MStream As New MemoryStream byteArray.

Read byteArray, 0, byteArray. Dispose End Sub Select all Open in new window I'm a bit lost here and I return really use your help. Please feel free to ask any details return may help. Thank you in advance jqOn ' questionView.

David Johnson, CD, MVP. When i retrieve jpg and other image files from the database also some mp3's that open with winamp - which is set as the default app it seems that it returns a null value, causing Now if i change the default application that a file is using in order to open it, it works just fine Which is it?

You say Winamp is the default application on your computer for. When i changed the default app for mp3s back to winamp, it crashed. If someone has for instance winamp for mp3 and return has windows media player, i need the app to open the files code each default app the user has selected. Same goes for pictures Can you post a screenshot of the debug screen with the line it points to when that exception is thrown?

WaitforExit there is the problem because the value of Process is null. Mike Tomlinson Mike Tomlinson earned total points. Are you sure that the path pointed to by return is valid? Also, since you literally just wrote the file out in the previous line, it may not be fully released when you attempt to utilize it with Process. You might need a slight delay, not sure for how long, in there The file opens correctly if for example i use IrfanView as the default picture viewer.

Thank you in advance. Sleep Select all Open in new window in process.waitforexit to delay for 0. In pictures it works fine, also since the fiel is loaded in memory the app deletes the temp file from the hard drive.

The only problem now is the mp3 files that open with Winamp as the default app. Since its streaming the file cannot be deleted. I'll need to figure a work around for it unless another player is used. As stated process.waitforexit, how can i code Windows Photo Viewer in my app to code it? For a "photo viewer" you just code to add a PictureBox to you form and load the file into it Here's some example code for loading an image return a PictureBox: Zoom Using fs As New System.

FromStream fs Code Using Catch ex As Exception MessageBox. ToString, "Error Loading Image", MessageBoxButtons. Error End Try End Select Select all Open in new window jqOn ' answerOrCommentView. If your files are. WAV then you can load them into a MemoryStream and use My. Not unless you embed a windows media player control in your form. Tony Tony earned 0 total points. I've tried the app in both WinXP and Win Using try-catch, i prevent that and the user does not see anything. Also in Win7 the app deletes the file and keeps the image into memory so no harm done there either.

If only there was a complete solution to this problem, but i think Microsoft has an issue here. Author Closing Comment by: This is a good solution because it actually displays the process.waitforexit wanted.

Question has a verified solution. How to control devices on USB with keyboard interface. After several hours process.waitforexit googling I could not gather any information on this topic.

There are several ways of controlling the USB port connected to any storage return. NET Process.waitforexit FX Rates from ECB site and parsing XML into a datatable. The ECB site provides FX rates for major currencies since its inception in in the form of an XML feed. The files have the following format reducted for brevity CODE There are code files available HERE http: Excel Error Handling Part 3 -- Run and Fix Bugs.

This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. Webinar - Percona Software News and Roadmap Update. How to Prepare for and Navigate a Ransomware Attack.

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