Pass Array from code behind routine to javascript

Question

I have a procedure in C# code-behind that reads values from several fields in a database and puts each into its own 1 dimensional array. Now I need to take those values and pass them to the client side so that I can print them out on a thermal printer.
In my code-behind I have:

        Public String[] PayType = new string[DetailLines];
        Public String[] PayQuantity = new string[DetailLines];
        Public String[] PayAmount = new string[DetailLines]'
        Public String Location;

       Protected Void PrintReceipt()
       *Miscellaneous code down to this point not shown.* 
        **DetailLines comes from record count**
       Location = "CA";
       PayType = new string[DetailLines];
       PayQuantity = new string[DetailLines];
       PayAmount = new string[DetailLines]'
        foreach (DataRow row in dtPOSdetail.Rows)
        {
           PayType[LineNumber] = row["fldDescription"].ToString();
           PayQuantity[LineNumber] = row["fldQuantity"].ToString();
           PayAmount[LineNumber] = string.Format("{0:C}",
           Decimal.Parse(row["fldAmount"].ToString()));
           LineNumber++;
         }

In my JavaScript I have:

var getLocation = '<%= Location %>'
var getPayType =  '<%= PayType %>'
var getPayQuantity = '<%= PayQuntity %>'
var getAmount = '<%= PayAmount %>'

I want to be able to do loop through the three arrays in my printer setup to establish line items.

request += builder.createTextElement({ data: "Location: " + GetLocation + "\\n" });
for (int i = 0; i < PayType.Length; i++)
{
   request += builder.createTextElement({ data: PayType[i] + "\\x9" + PayQuantity[i] + "\\x9" + "     " + PayAmount[i] + "\\n"});
}

I can print out Location but the value of each of my arrays shows as 'System.String[]. Most topics I have read on this are confusing showing the array being loaded as 'var myarray("apples", "oranges", "peaches"). I have also seen topics talking about serializing the array but that is not clear either. Any examples of how to accomplish what I have shown would be greatly appreciated. Thanks Charles

Piou · Accepted Answer · 2016-12-26 21:49:00Z

1

This happens because Razor (or your veiw engine) is calling the ToString() method of the object being injected into the view script.

With a string array type this produce what you are seeing: System.String[].

As javascript variable is expecting a JSON formatted object to instantiate variables, you can simply serialize to JSON your array as followed:

var getPayType = <%= Newtonsoft.Json.JsonConvert.SerializeObject(PayType) %>;

edited Dec 26, 2016 at 21:49

answered Dec 26, 2016 at 21:43

Piou

1,0661 gold badge8 silver badges10 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Charles Over a year ago

Thank You! This is exactly what I was looking forward. Hopefully by me laying things out and your concise answer this can help someone else.

Collectives™ on Stack Overflow

Pass Array from code behind routine to javascript

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related