当离开richtextbox时，所有文本颜色更改为第一个字符颜色

Question

在我的C＃WinForm项目上，当我离开richtextbox并输入另一个组件时，richtextbox颜色的所有文本都更改为第一个字符颜色。

Answer 1

谢谢所有人，但我绑定了富文本框并使用数据绑定填充了它，然后我在设置颜色后使用此空隙v_srarch_WithOutTashkilAll为某些单词设置了颜色，如果我使用鼠标单击将富文本框控件留给其他控件，则所有文本都以富色使用第一个字符重新着色的文本框

Answer 2

this void created to find all word in rich text box named rtb and change word color to red it's work right but if i leaved rich text box control to other control all character color be the first character color this is my proplem

public void v_srarch_WithOutTashkilAll(string word, RichTextBox rtb) {

        try
        {

            if (startSelection >= 0)
            {
                startSelection = rtb.Find(word, startSelection, rtb.TextLength, RichTextBoxFinds.None);
            }

            if (startSelection != -1)
            {
                char[] arr = new char[] { 'ّ', 'َ', 'ً', 'ُ', 'ٌ', 'ِ', 'ٍ', 'ْ' };


                int index = 0;
                string CurrentWord = "";
                char charForTest;
                try
                {
                    while (CurrentWord != word)
                    {
                        rtb.Select(startSelection + index, 1);
                        charForTest = Convert.ToChar(rtb.SelectedText);
                        if (arr.Contains(charForTest))
                        {
                            index++;

                        }
                        else
                        {
                            CurrentWord += charForTest.ToString();
                            index++;
                        }
                    }
                    rtb.Select(startSelection, index);
                    rtb.SelectionColor = System.Drawing.Color.Red;
                    startSelection += index;
                    v_srarch_WithOutTashkilAll(word, rtb);
                }
                catch (Exception)
                { }

            }
        }
        catch (Exception)
        { }
    }