Encoding of the Multirow Textbox content in the HTTP request

When using of the multi-row TextBox ASP.NET control, sometime it is required to send the content of that box to server.

For example the request http://host/myapp/default.asp?textboxcontrol=prm

can be created with the javascript as shown:

var prm = document.all[“myTextControl”].innerHTML;

window.showModalDialog(“http://host/myapp/default.asp?textboxcontrol=.” +

prm,..);

On the server side the request can be read as follows:

string prm = Request[“textboxcontrol”] as string;

This all is very easy to perform. However the example above will not work if the content of the control is a text consisted of many rows.

For example, the text

“row1

row2”

will be decoded on the server side as: row1+row2, which is obviously not the expected value.

To ensure that the text is decoded properply the content of the textbox has to be encoded propely at the client side. The right solution would look as shown here:

var prm = escape(document.all[“myTextControl”].innerHTML);

In this case the server receives the request, which contains all required and properly encoded information: row1+%0d%0arow2