CODEWITHSUNDEEP
c#
Luis Lugo
Luis Lugo

Reputation: 9

How can I show only specific parts of a text line in C#

Hello sorry if the answer for this is already out there somewhere but I did not find it, or did not understand it. What I have to do is I have a list box in visual studio (C#) and in this list box are some options to click on.

PinturaV $100

PinturaA $105

PinturaE $115

Lijas_Ag $112

Solvente $101

If I select a line for example PinturaA $105 from the list box in a text box that I have it should show only 105. Then if I select for example Lijas_Ag $112, the text box should show...

105

112

And so on until I press the total button and it would give me the total. My problem is having just the numbers appear on the text box. I coded so that the program can read the line selected and tell me where the space is located but I don't know if this was even needed to be able to get the number into the text box. I have no Idea how to do this. Any help would be much appreciated. I left some pics in case that helps.

Thank You

main selected

Code I have so far

Upvotes: 0

Views: 250

Answers (5)

John Wu
John Wu

Reputation: 52240

The other answers are OK and will probably work. But just so you know, the typical way to handle this sort of thing is to put the data you want in the ListItems' Value property and the text in the Text property, like this:

private void PopulateListBox1()
{
    listBox1.Add(new ListItem("100","PinturaV $100"));
    listBox1.Add(new ListItem("105","PinturaA $105"));
    listBox1.Add(new ListItem("115","PinturaE $115"));
    listBox1.Add(new ListItem("112","Lijas_Ag $112"));
    listBox1.Add(new ListItem("101","Solvente $101"));
}

And then get the Value instead of Text, like this:

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    textBox1.Text = listBox1.SelectedValue; 
}

As you can see this is far, far simpler than parsing the string returned by ListItem.Text.

Upvotes: 0

csharpbd
csharpbd

Reputation: 4066

You should use Regex to get your desired output. You need to apply Regex in your ListBox event. Please check below for Regex & C# example.

Regex:

\d+

Above Regex will give you all digit from your string

CODE C#:

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    // Your others code & logic

    //string data = "PinturaV $100";
    string data = listBox1.Text;
    textBox1.Text = Regex.Match(data, @"\d+").Value;
}

Upvotes: 1

austin wernli
austin wernli

Reputation: 1801

You could use Regex and just do 

    var item = "Solvente $101";
    var val = Regex.Match(item, @"\$(\d+)").Groups[1];

Upvotes: 0

Imanuel
Imanuel

Reputation: 3667

You can do this easily with a regex:

var oldtext = "Solvente $101";
var newtest = Regex.Match(oldText, "\\d+$").Groups[0].Value;

The variable newtext will contain the digits.

Upvotes: 0

Rahul
Rahul

Reputation: 77876

Considering the selected text is PinturaA $105 .. you can use regular expression (or) string library method to get only the numbers like

string str = "PinturaA $105";
string val = (str.IndexOf("$") > 0) 
              ? str.Substring(str.IndexOf("$"), str.Length - str.IndexOf("$")) 
              : string.Empty;

Upvotes: 0

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