I've saved icon font character codes in database:
f130, f150, ...
How can I show this codes as Icon?
Button.Text = "\u" + IconEntity.Value; // Error: invalid escape character!
if i use string formating, the button's text did not show icon correctly!
Button.Text = #"\u" + IconEntity.Value; //Button Text = \uf130
When you write strings with an escape charecter, c# treats the following text as a single char. For example, writing the string "\u0041" Will result in the string printing as the single char A.
When you start writing "\u" and then break the string, it'll treat it as a sequence of charecters, rather than a single one.
What you can do, however is create a char variable from it's hex value. You can do it by simply casting an int variable or literal to char.
Try implementing something similar to this:
static void Main(string[] args)
{
var str = "41";
var i = int.Parse(str, NumberStyles.HexNumber);
// Prints the char "A"
Console.WriteLine((char) i);
}
Related
I've been working on a tool to modify a text file to change graphics settings for a game. A few examples of the settings are as follows:
sg.ShadowQuality=0
ResolutionSizeX=1440
ResolutionSizeY=1080
bUseVSync=False
I want to be able to find sg.ShadowQuality=(rest of line, regardless of what is after this text), and replace it. This is so that a user can set this to say, 10 then 1 without having to check for 10 and 1 etc.
Basically, I'm try to find out what I need to use to find/replace a string in a text file without knowing the end of the string.
My current code looks like:
FileInfo GameUserSettings = new FileInfo(#SD + GUSDirectory);
GameUserSettings.IsReadOnly = false;
string text = File.ReadAllText(SD + GUSDirectory);
text = text.Replace("sg.ShadowQuality=0", "sg.ShadowQuality=" + Shadows.Value.ToString());
File.WriteAllText(SD + GUSDirectory, text);
text = text.Replace("sg.ShadowQuality=1", "sg.ShadowQuality=" + Shadows.Value.ToString());
File.WriteAllText(SD + GUSDirectory, text);
SD + GUSDirectory is the location of the text file.
The file must have readonly Off to be edited, otherwise the game can revert the settings back, hence the need for this.(It is turned back to readonly On after any change, its just not included in this code provided)
You can do it like you do, if you use a regular expression to match all the line
FileInfo gameUserSettings = new FileInfo(Path.Combine(#SD, GUSDirectory)); //name local varaible in camelCase, use Path.Combine to combine paths
gameUserSettings.IsReadOnly = false;
string text = File.ReadAllText(gameUserSettings.FullName); //use the fileinfo you just made rather than make the path again
text = Regex.Replace(text, "^sg[.]ShadowQuality=.*$", $"sg.ShadowQuality={Shadows.Value}", RegexOptions.Multiline); //note switch to interpolated strings
File.WriteAllText(gameUserSettings.FullName, text);
That regex is a Multiline one (so ^ and $ have altered meanings):
^sg[.]ShadowQuality=.*$
start of line ^ (not start of input)
followed by sg
followed by period . (in a character class it loses its "any character" meaning)
followed by ShadowQuality=
followed by any number of any character(.*)
followed by end of line $ (not end of input)
The vital bit is "any number of any character" that can cope with the vlaue in the file being 1, 2, 7, hello and so on..
The replacement is:
$"sg.ShadowQuality={Shadows.Value}"
This is an interpolated string; a neater way of representing strings that mix constant content (hardcoded chars) and variable content. When a $tring contains a { that "breaks out" of the string and back into normal c# code so you can write code that resolves to values that will be included in the string -> if Shadows.Value is for example a decimal? of 1.23 it will become 1.23
You can format data too; calling for $"to one dp is {Shadows.Value:F1}" would produce "to one dp is 1.2" - the 1.23 is formatted to 1 decimal place by the F1, just like calling Shadows.Value.ToString("F1") would
I need to process a numeral as a string.
My value is 0x28 and this is the ascii code for '('.
I need to assign this to a string.
The following lines do this.
char c = (char)0x28;
string s = c.ToString();
string s2 = ((char)0x28).ToString();
My usecase is a function that only accepts strings.
My call ends up looking cluttered:
someCall( ((char)0x28).ToString() );
Is there a way of simplifying this and make it more readable without writing '(' ?
The Hexnumber in the code is always paired with a Variable that contains that hex value in its name, so "translating" it would destroy that visible connection.
Edit:
A List of tuples is initialised with this where the first item has the character in its name and the second item results from a call with that character.
One of the answers below is exactly what i am looking for so i incorporated it here now.
{ existingStaticVar0x28, someCall("\u0028") }
The reader can now instinctively see the connection between item1 and item2 and is less likely to run into a trap when this gets refactored.
You can use Unicode character escape sequence in place of a hex to avoid casting:
string s2 = '\u28'.ToString();
or
someCall("\u28");
Well supposing that you have not a fixed input then you could write an extension method
namespace MyExtensions
{
public static class MyStringExtensions
{
public static string ConvertFromHex(this string hexData)
{
int c = Convert.ToInt32(hexCode, 16);
return new string(new char[] {(char)c});
}
}
}
Now you could call it in your code wjth
string hexNumber = "0x28"; // or whatever hexcode you need to convert
string result = hexNumber.ConvertFromHex();
A bit of error handling should be added to the above conversion.
Am reading from an excel sheet column and need to save into an sql table.
this is what the fiedl looks like in excel;'33349836', but I need it to be saved this way in the database '0033349836', because that field needs to be 10characters.
You can use String.PadLeft Method (Int32, Char) overload.
Returns a new string that right-aligns the characters in this instance
by padding them on the left with a specified Unicode character, for a
specified total length.
string s = "33349836";
string newstring = s.PadLeft(10, '0');
Remember, 0033349836 will be a string representation of your numeric values. Don't keep this kind of data in a numeric column type. Keep it in a some character type of column like nvarchar.
There are a couple of ways to do this using C#.
One such way is this:
static void Main(string[] args)
{
string s = "33349836";
int width = 10;
char padding = '0';
string s1 = s.PadLeft(width, padding);
Console.WriteLine(s);
Console.WriteLine(s1);
}
That code will output these values:
33349836
0033349836
You can use PadLeft() function to add zeros to your string.
Try This:
var str = "33349836";
str = str.PadLeft(10,'0');
I am working in Asp.Net C#, on converting typed letters into textbox, to automatically be changed in cyrillic. If i type "B" should be displayed "Б"... I've made it on textchanged with autoPostBack:
string str = char.ConvertFromUtf32(66);
str = "Б";
txtBox.Text = str;
But is it possible for live converting immediately after entering the letter.
I can use the Alt Key with the Number Pad to type symbols, but how do I programmatically insert a Symbol (Pound, Euro, Copyright) into a Textbox?
I have a configuration screen so I need to dynamically create the \uXXXX's.
In C#, the Unicode character literal \uXXXX where the X's are hex characters will let you specify Unicode characters. For example:
\u00A3 is the Pound sign, £.
\u20AC is the Euro sign, €.
\u00A9 is the copyright symbol, ©.
You can use these Unicode character literals just like any other character in a string.
For example, "15 \u00A3 per item" would be the string "15 £ per item".
You can put such a string in a textbox just like you would with any other string.
Note: You can also just copy (Ctrl+C) a symbol off of a website, like Wikipedia (Pound sign), and then paste (Ctrl+V) it directly into a string literal in your C# source code file. C# source code files use Unicode natively. This approach completely relieves you from ever even having to know the four hex digits for the symbol you want.
To parallel the example above, you could make the same string literal as simply "15 £ per item".
Edit: If you want to dynamically create the Unicode character from its hex string, you can use this:
public static char HexToChar(string hex)
{
return (char)ushort.Parse(hex, System.Globalization.NumberStyles.HexNumber);
}
For example, HexToChar("20AC") will get you the Euro sign.
If you want to do the opposite operation dynamically:
public static string CharToHex(char c)
{
return ((ushort)c).ToString("X4");
}
For example CharToHex('€') will get you "20AC".
The choice of ushort corresponds to the range of possible char values, shown here.
I cant believe this was difficult to find on the internet!
For future developers,if you have the unicode character its easy to do. eg:
C#:
var selectionIndex = txt.SelectionStart;
string copyrightUnicode = "00A9";
int value = int.Parse(copyrightUnicode, System.Globalization.NumberStyles.HexNumber);
string symbol = char.ConvertFromUtf32(value).ToString();
txt.Text = txt.Text.Insert(selectionIndex, symbol);
txt.SelectionStart = selectionIndex + symbol.Length;
VB.Net
Dim selectionIndex = txt.SelectionStart
Dim copyrightUnicode As String = "00A9"
Dim value As Integer = Integer.Parse(copyrightUnicode, System.Globalization.NumberStyles.HexNumber)
Dim symbol As String = Char.ConvertFromUtf32(value).ToString()
txt.Text = txt.Text.Insert(selectionIndex, symbol)
txt.SelectionStart = selectionIndex + symbol.Length