How can I find out if a variable has a value?

板砖飞校长

I am using vb.net to make a website. There is a sentence in the foreground code: <% = theTitle%> How can I debug to know if this variable has a value? , I directly press F5 without error, but this variable is not displayed, I can't figure it out. Masters talk about vs debugging, the more detailed the better.

sumu007

<% =%> This seems to be invisible under debug. I haven't tried it, but I can put output like ":" before and after it.

zhouji700

Set breakpoints in VS, just look at the breakpoints

zhouji700

In VS, set a breakpoint at theTitle assignment statement to see if it will be executed there. If it is executed, you can directly see its value

zhengminglin

You can set a breakpoint to see the value of the variable, or you can use alert (<% = theTitle%>) on the client.

yfacmilan

<% = theTitle%> Set the interrupt (F9) on the next statement, then debug (F5), right-click on theTitle after running-> Quick Monitor

阿基米德碎片

The webpage can only be interrupted

板砖飞校长

<% = theTitle%> In the foreground code, there is no way to set a breakpoint,

板砖飞校长

I added <script> </ script> to the foreground code, I also want to put the code in <script> </ script> in the background page, but in this way, <% = theTitle in the foreground code %> I did n’t report the error, what should I do?

yfacmilan

Then
response.write (theTitle)
response.end