C＃：Ctrl +向右和向左Shift键和KeyUp以及更改richTextBox的语言 [英] C#: Ctrl +Right and Left Shift key and KeyUp and changing language of the richTextBox

问题描述

您好

我有几个richTextBox。我为其中一个编写了这段代码：

I have several richTextBoxes. I wrote this code for one of them:

        [System.Runtime.InteropServices.DllImport("user32.dll")]
        private static extern short GetAsyncKeyState(Keys vKey);
        private void rtbFMR_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.ShiftKey)
            {
                if (Convert.ToBoolean(GetAsyncKeyState(Keys.LShiftKey)))
                {
                    InputLanguage.CurrentInputLanguage = InputLanguage.FromCulture(System.Globalization.CultureInfo.CreateSpecificCulture("en-US"));
                    rtbFMR.Select(rtbFMR.SelectionStart, 0);
                    rtbFMR.SelectionFont = new Font("Tahoma", 10, FontStyle.Regular);
                }
                else if (Convert.ToBoolean(GetAsyncKeyState(Keys.RShiftKey)))
                {
                    InputLanguage.CurrentInputLanguage = InputLanguage.FromCulture(System.Globalization.CultureInfo.CreateSpecificCulture("fa-IR"));
                    rtbFMR.Select(rtbFMR.SelectionStart, 0);
                    rtbFMR.SelectionFont = new Font("Arial", 12, FontStyle.Regular);
                }
            }
                   }

如果我不使用"InputLanguage"。 CurrentInputLanguage = InputLanguage.FromCulture（System.Globalization.CultureInfo.CreateSpecificCulture（" fa-IR"））"和"InputLanguage.CurrentInputLanguage = InputLanguage.FromCulture（System.Globalization.CultureInfo.CreateSpecificCulture（" en-US"））"，
richTextBox的语言不会改变。

If I do not use "InputLanguage.CurrentInputLanguage = InputLanguage.FromCulture(System.Globalization.CultureInfo.CreateSpecificCulture("fa-IR"))" and "InputLanguage.CurrentInputLanguage = InputLanguage.FromCulture(System.Globalization.CultureInfo.CreateSpecificCulture("en-US"))", the language of the richTextBox is not changed.

AND

我无法用左右箭头键+ shift键选择richTextBox文本的一部分。

I cannot select a part of the text of the richTextBox with right and left arrow keys + shift key.

推荐答案

我在程序中使用了这段代码，但是没有更改richTextBox的语言。为什么？我无法理解。

I used This code in my program but the language of the richTextBox is not changed. Why? I cannot understand.

        private void richTextBox2_KeyPress(object sender, KeyPressEventArgs e)
        {
            if(char.IsLetter(e.KeyChar))
            {
                if ((e.KeyChar >= 'a' && e.KeyChar <= 'z') || (e.KeyChar >= 'A' && e.KeyChar <= 'Z'))
                {
                    //MessageBox.Show("Letter " + e.KeyChar.ToString());
                    richTextBox2.Select(richTextBox2.SelectionStart, 0);
                    richTextBox2.SelectionFont = new Font("Tahoma", 10, FontStyle.Italic);
                }
                else
                {
                    //MessageBox.Show("Letter " + e.KeyChar.ToString());
                    richTextBox2.Select(richTextBox2.SelectionStart, 0);
                    richTextBox2.SelectionFont = new Font("Tahoma", 12, FontStyle.Bold);
                }
            }
            else if (char.IsDigit(e.KeyChar))
            {
                //MessageBox.Show("Digit");
                if (InputLanguage.CurrentInputLanguage.Culture.Name == "fa-IR")
                {
                    if (e.KeyChar == '\u0030')
                        e.KeyChar = '\u0660';
                    else if (e.KeyChar == '\u0031')
                        e.KeyChar = '\u0661';
                    else if (e.KeyChar == '\u0032')
                        e.KeyChar = '\u0662';
                    else if (e.KeyChar == '\u0033')
                        e.KeyChar = '\u0663';
                    else if (e.KeyChar == '\u0034')
                        e.KeyChar = '\u0664';
                    else if (e.KeyChar == '\u0035')
                        e.KeyChar = '\u0665';
                    else if (e.KeyChar == '\u0036')
                        e.KeyChar = '\u0666';
                    else if (e.KeyChar == '\u0037')
                        e.KeyChar = '\u0667';
                    else if (e.KeyChar == '\u0038')
                        e.KeyChar = '\u0668';
                    else if (e.KeyChar == '\u0039')
                        e.KeyChar = '\u0669';
                }
            }
            else
            {
                //MessageBox.Show("Sign");
            }
        }

已编辑：

我正在运行我的程序。它运行良好。为什么？为什么以前没有使用此代码运行？

I am running my program. It is running well. Why? Why was not it run with this code previously?

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