I want to restrict the special characters like"æ"&3quƒ" from loading into XML document

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I want to restrict the special characters like"æ"&3quƒ" from loading into XML document

[Removed duplicated posted code...]

What I have tried:

C#

try
{
	XmlDocument doc = new XmlDocument();
	doc.LoadXml(" <item><name>Progress");


	if (0==0)
	{
		XmlElement newElem = doc.CreateElement("start");
		newElem.InnerText = txtpartname.Text;
		doc.DocumentElement.AppendChild(newElem);
		XmlElement newElem1 = doc.CreateElement("starting");
		newElem1.InnerText = txtpartdesg.Text;
		doc.DocumentElement.AppendChild(newElem1);
		XmlElement newElem2 = doc.CreateElement("started");
		newElem2.InnerText = txtpartcomp.Text;
		doc.DocumentElement.AppendChild(newElem2);
		
		doc.PreserveWhitespace = true;
		doc.Save("data.xml");
	}
	else
	{
		label4.Text = "error";
	}
}
catch (Exception)
{
	labl2.Text = "Enter keyboard characters";
}

Posted 23-Aug-17 21:47pm

Member 13375990

Updated 23-Aug-17 22:07pm

Graeme_Grant

v2

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Graeme_Grant · Accepted Answer · 2017-08-23T22:10:00

Add a method to strip out the unwanted characters:

C#

static char[] invalid = "æ\"&3quƒ".ToCharArray();
string StripUnwantedCharacters(string input)
{
    string output = "";

    // do work here
    if (!string.IsNullOrEmpty(input))
        output = new string(input.Where(x => !invalid.Contains(x)).ToArray());

    return output;
}

To use:

C#

newElem.InnerText = StripUnwantedCharacters(txtpartname.Text);