Comapring two <asp:TextBox> lines

[tsisher]

Is it possible to do this ?

Let me explain this.
// aspx
<asp:TextBox runat="server" ID="txtOld" TextMode="MultiLine" Columns="70" Rows="30" Width="425px" />
<asp:TextBox runat="server" ID="txtNew" TextMode="MultiLine" Columns="70" Rows="30" Width="425px" />
<asp:Button Text="Compare" runat="server" ID="btnCompare" OnClick="btnCompare_Click" />

// c#
I have two string

string strOld = "This a line 1\nThis is going to be line 2\rThis is going to be line 3\rThis is line 4";
string strNew = "This a line 1\nThis text is changed here going to be line 2\rThis is going to be line 3\rThis is changed line 4";

Please note that these strings have \n and \r in it.

When form loads, I do something like this
if (!IsPostBack)
{
txtOld.Text = strOld;
txtNew.Text = strNew;
}
Web browser automatically splits the strings and align nicely in the Text box like this

txtOld TextBox renders like this

This a line 1
This is going to be line 2
This is going to be line 3
This is line 4

txtNew TextBox renders like this

This a line 1
This text is changed here going to be line 2
This is going to be line 3
This is changed line 4

Now when hit compare button, I need to mark the lines and change the color of the lines in the text box which are different,

for example
Line 2 and line 4 in the above example.
I may be able to compare the strings but how do I mark and change color of the lines in the text box.
Please advice.

Any new ideas. Looking forward to it.

Thanks

 

[ca8msm]

I think you would be better off doing this client side using javascript rather than posting back to the server. You would also struggle to apply any colour formatting to the text within a textarea without using client scripting.

Mark,

Darlington Web Design[tab]|[tab]Experts, Information, Ideas & Knowledge[tab]|[tab]ASP.NET Tips & Tricks

 

[tsisher]

Any idea how?
Thanks

 

[ca8msm]

You will be better off posting here: forum216

Remember to post your question providing an example that uses client-side code only, as they may not understand what markup an asp:TextBox will create.

Mark,

Darlington Web Design[tab]|[tab]Experts, Information, Ideas & Knowledge[tab]|[tab]ASP.NET Tips & Tricks