How to Convert Double Byte String to Single Byte String?

Question

I am a newbie at C#.
I have a Textbox and it is allowed to accept double_byte string and it is used to input/show Date Value. Now I am having a problem and I don't know how to solve this.I googled about it,and can't find any solution for it.
When I wrote Double_Byte Characters( ２０１２／１２／３１) ,I want to change this value to (2012/12/31) at Leave_Event of TextBox or Text_Changed Event of this TextBox. So, How can I solve the problem.

Edit->My Solution is Window Application.

Thanks in advance.

what do you mean by " is allowed to accept double_byte string " ? — Freelancer
– Freelancer, Commented Mar 11, 2013 at 5:36
to store that value in database , what datatype you have used at backend[database]? — Freelancer
– Freelancer, Commented Mar 11, 2013 at 5:37
you might try to do something similar to this: var bytes = Encoding.Convert(Encoding.Unicode, Encoding.ASCII, sourceString); string ascii = Encoding.ASCII.GetString(bytes); — Jens Meinecke
– Jens Meinecke, Commented Mar 11, 2013 at 5:48

sa_ddam213 · Accepted Answer · 2013-03-11 06:07:23Z

4

You should be able to use Encoding.Default to convert the double_byte string to a single_byte string

 string singleByteString = Encoding.Default.GetString(Encoding.Default.GetBytes(inputText));

Tests:

    private void button1_Click(object sender, EventArgs e)
    {
        string inputText = textBox1.Text;
        string singleByteString = Encoding.Default.GetString(Encoding.Default.GetBytes(inputText));

        textBox2.Text = singleByteString;
        textBox3.Text = inputText;
    }

Result:

enter image description here

edited Mar 11, 2013 at 6:07

answered Mar 11, 2013 at 6:02

sa_ddam213

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4 Comments

nnnn Over a year ago

It still give ２０１２／１２／３１.I tested simple window application like you mentioned above.

sa_ddam213 Over a year ago

try Encoding.ASCII.GetString(Encoding.Default.GetBytes(inputText))

nnnn Over a year ago

?Q?O?P?Q?^?P?Q?^?R?P is the result of Encoding.ASCII.GetString(Encoding.Default.GetBytes(inputText))

nnnn Over a year ago

Thank you, I added a solution.

Community · Accepted Answer · 2017-05-23 12:16:07Z

1

Thank you for all of your answers and interests.
I searched a solution for this and not found any answer .Finally ,I got a nice answer from my colleague. Therefore, I share the answer of this problem.

Add Reference Microsoft.VisualBasic
write code like this(test like sa_ddam213's answer)-


using Microsoft.VisualBasic;

private void button1_Click(object sender, EventArgs e)
{
      string inputText = textBox1.Text;
      string singleByteString =  Strings.StrConv(inputText, VbStrConv.Narrow, 0);

      textBox2.Text = singleByteString;
      textBox3.Text = inputText;
}

edited May 23, 2017 at 12:16

CommunityBot

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answered Mar 11, 2013 at 7:36

nnnn

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1 Comment

sa_ddam213 Over a year ago

+1, Another hidden gem in the Microsoft.VisualBasic namespace :)

Freelancer · Accepted Answer · 2013-03-11 05:45:52Z

-1

When you send your text box value in database , parse it to Date.

Make sure that you are storing that text box'x value in database as DateTime datatype.

parsing can be done as follows>

double d = double.Parse(txtDate.text);
DateTime conv = DateTime.FromOADate(d);

Or simplest way use>>

DateTime.Parse(txtDate.Text);

Hope this will help you.

answered Mar 11, 2013 at 5:45

Freelancer

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3 Comments

Corey Over a year ago

With the Unicode strings the OP is dealing with, this will fail.

Freelancer Over a year ago

DateTime.Parse(txtDate.Text); will not fail. I have tried it in many windows apps.

Corey Over a year ago

Really? Have you tried it on the Unicode string the OP just posted, which uses code-points that are way outside the standard ASCII range? It fails. It doesn't know that Unicode code-point FF10 is a '0' for instance. Unless there's something funky with your localization settings?

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