How to delete string from a XML file opened in a text editor in C#?

[anupam roy]

Hi,

I have created one XMLEditor and opened XML files in it.

Before closing the file i am validating the xml file and if some invalid entries are present, i am able to fetch the row and column number of the error text in the file.

Now i want delete that error text from the RichTextBox before saving the file.

How to do that in C# .NET?

Thanks,
-Anupam

[jkmyoung]

Could you post how you're retrieving the text from the RichTextBox in the first place?
Can you just use a .Clear method, or try setting the Text property to the empty string?

[anupam roy]

Could you post how you're retrieving the text from the RichTextBox in the first place?
Can you just use a .Clear method, or try setting the Text property to the empty string?

Thanks a lot for the reply!!

I am validating the saved XML against the XSD at first.

If some invalid text string is found,its the event handler class is getting hit

which i have implemented ..its like....XmlLoaderValidationEventHandler(object sender, ValidationEventArgs e)

but i m not able to retrieve the text(error string) but able to retrieve the row number of the string in text box as i mentioned.

Now with this row number and coln number how will i be able to delete that string from the text box and save the file?

If i know the string anyways i would have set it to selectedString="";

But this is not possible for me as of now..

If its not possible for what i m looking for, atleast can i set the control(cursor) to the start of the error string once event handler is hit so that it will prompt the user to delete the string from XML file manually ??

Suggestion will be much appreciated..

thanks in advance!!

-Anupam

[Frinavale]

Hi,

I have created one XMLEditor and opened XML files in it.

Before closing the file i am validating the xml file and if some invalid entries are present, i am able to fetch the row and column number of the error text in the file.

Now i want delete that error text from the RichTextBox before saving the file.

How to do that in C# .NET?

Thanks,
-Anupam

From what I understa, you are loading the file into your program to display it into the RichTextBox.

Couldn't you search the text value of this text box for the row that the error exists on (count the number of newlines to get to the row) and then parse that row's text to remove the invalid value?

[anupam roy]

From what I understa, you are loading the file into your program to display it into the RichTextBox.

Couldn't you search the text value of this text box for the row that the error exists on (count the number of newlines to get to the row) and then parse that row's text to remove the invalid value?

Hi Frinavale,

Thanks for the reply!!

U r absolutely right!! i am indeed loading the file and writing it to the RichTextBox to display it.

but the invalid entry i am talking about, basically can be even a string or single character,number, or a alphaneumaric string.

How will i be able to reach to the row value in the textBox again as my control has come out of it...and reached a diffrent path.

Is there any API by which i can directly call the editor and shift the control there?

Thanks,
-ANupam

[Frinavale]

Hi Frinavale,

Thanks for the reply!!

U r absolutely right!! i am indeed loading the file and writing it to the RichTextBox to display it.

but the invalid entry i am talking about, basically can be even a string or single character,number, or a alphaneumaric string.

How will i be able to reach to the row value in the textBox again as my control has come out of it...and reached a diffrent path.

Is there any API by which i can directly call the editor and shift the control there?

Thanks,
-ANupam

I've never used RichTextBoxes before (I think they're restricted to Windows and as I'm mostly a web developer I don't want to restrict my user).
I'm unsure of any API that can do this for you.

In order to go to the column value where the error happened, you'll have to count the number of new lines (to get the right line)...then do a SubString on that line starting at the Column value.

From what I remember about XML is that the value has to be within double quotes: ""...so do an extra sub string to extract the exact value...
From there you should probably use your own logic to determine what is invalid about that string.