Uncaught TypeError: Cannot read property ‘value’ of null


If you getting this error message in java-script, then you might be thinking that you have written some wrong syntax in java-script, but it is not the syntax problem, it is the problem with reading value of that Id which one you have given to read the values. For example in the below code i have given the wrong text-box Id to read the value then i will get this exception.


How to show the active file in Visual Studio?

While working on big project we will navigate so many file of solution explore, but if we have to know where am in this solution explorer, then it will be difficult to find out.

But if we will change the setting in Visual studio then it will be very easy to find out the exact file path

Tools – Options – Projects and Solutions – Track Active Item

What is the batch file ?

Batch file is the file, which contains the collection command which should to be executed by command prompt. Batch file make user life more easier.

If user will click on batch file all the set of dos command statement will be executed. Batch file is also know as .bat extension file.

How to create the batch file ?

We can create the simple batch like this steps

Step 1 : Open the notepad file

Step 2 : Type this code in batch file

@echo off
echo Hello this a test batch file
dir c:\windows

Note: Here echo is used to display the message in Dos prompt and pause is used to hold the screen

Step 3: Save the file as .bat extension like this

Step 4: Double click on Test.bat file, you will get the output like given below

In the above sample we saw that without writing the code in command prompt we can execute some set of command.

How to change the Default Company Name while creating window Setup Installer ?

If you are creating the Project Setup installer in Window Application then Author and manufacturer Name will come like “Default Company Name”. But if you have to change name then you can do like this


Step 1: Go to project Setup and Click F4 like this Image



Step 2: Change the name in Deployment Project Properties like this Image



Step 3: Build the application.

I hope this will help somebody who is new to window application.