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I'm using Visual Studio with asp.net, vb.net, and webforms. I am trying to concatenate each RoleDescription and FirstName and add them into a new column on my datatable.

This line Dim RoleNameConcat = sdr.GetValue("RoleDescription") + " - " + sdr.GetValue("firstname") throws the error

System.FormatException: Input string was not in a correct format.

How can I create this column in my datatable with the concatenated two values, separated with a dash?

I am attempting to send a simple json converted to byte [] written in C# to a Ubuntu system using curl that hits an HTTP listener written in Golang. The problem is that what is being sent appears to be System.Byte[] rather than something that could be interpreted as a byte []. I did an Encoding.UTF8.GetString of the converted byte array and it did return properly so something is missing with what or how I’m attempting to send.

C# webforms backend code

I have some form data that I'm writing to a database with PDO prepared statements.

This form data is santized and validated on the on the way in to the database with filter_var() functions and regular expressions and when any of this data is outputted to the site it escaped with htmlspecialchars().

To prevent SQL injections I'm using I'm using the code below. When I first learnt PDO this was what I saw in the tutorial and I personally find it very easy to read/understand.

I've noticed on the php.net site and in some other code I've saw recently they used bindparams(), whereas in the code below I've always done this inside an array in the execute() method.

Is my code below secure? Or must I use bindparams in the way that is shown in the second code example?

Here is some sample code using a firstname input from a webform

In WebForms we would have a web.config file that we could do ConfigurationManager.AppSettings["SomeKey"]; to retrieve the value from the key-value pair.

I've just started a project in .NET 5.0 and there doesn't seem a simple way to do something that seems to trivial?

I've looked online and have been unsuccessful in following tutorials on how to access these keys in appsettings.json from a .cshtml file using @ notation.

appsettings.json:

What Im trying to do is to hide the login button in masterpage header when the user logged in. Below are the codes.

SiteMaster.Master.aspx

I have a very strange problem with an asp.net webforms web application. As of today, I suddenly can't click any more buttons after I've logged into the site. On the login page everything works as usual, but on the page afterwards the cursor no longer changes into a pointer and clicking has no effect. With the keyboard I can easily navigate and also press the buttons.

I've already tried restarting the PC, swapping the mouse, and tried a different browser.

Everything works as usual on other websites, as well as on the published version of the same asp.net web application.

I am completely at a loss...

Any ideas?

Here is the screenshot of an unfinished request I found with the help of @Baskovli

How to published or hosting my Asp.net Core MVC Project To asphostportal.com or any other domain website. Is it Azure Mandatory for any asp.net core project. I already published many webform project on BigRock but .net core project is little bit complicated.

I have a legacy webforms application. For some reason, adding a complex object to session storage fails while adding simple data type like string works fine. This session is being added in asp:UpdatePanel. any ideas???

I see the following error in Global.asax, Application_Error module.

I'm trying to scrape a webform for text in specific fields however i can't do it with xpath because some forms are missing fields which won't be included in the page when it loads (i.e. if /html/blah/blah/p[3] is the initials field for one form it might be first name on another form but have the same xpath. The structure for the fields is like this: