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POTwo problems I can't solve when parsing the text how do i parse to the other way from right to left too?
 

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  1. POTwo problems I can't solve when parsing the text how do i parse to the other way from right to left too?
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    <p>This is the class that do the parsing:</p> <pre><code>public static string[] ParseText(string text, int startPos, int endPos) { List&lt;string&gt; parsedText = new List&lt;string&gt;(); string[] entries = null; if (startPos &gt;= 0 &amp;&amp; endPos &gt; startPos) { string images = text.Substring(startPos + 1, endPos - startPos - 1); entries = images.Split(new[] { ',' }); for (var i = 0; i &lt; entries.Length; i++) { entries[i] = entries[i].Replace("\"", ""); } for (int i = 0; i &lt; entries.Length; i++) { parsedText.Add(entries[i]); } } return entries; } </code></pre> <p>And in <code>Form1</code>:</p> <pre><code>private void richTextBox1_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { if (mouseisup == false) { textBox1.Text = ""; positionToSearch = richTextBox1.GetCharIndexFromPosition(new Point(e.X, e.Y)); richTextBox1.SelectionStart = positionToSearch; textBox1.Text = richTextBox1.Text.Substring(positionToSearch, 1); previousChar = positionToSearch; textBox2.Text = ""; mouseisup = true; } else { currentChar = richTextBox1.GetCharIndexFromPosition(new Point(e.X, e.Y)); if (currentChar &gt; previousChar + 1)//currentChar &lt; previousChar - 1) { richTextBox1.SelectionStart = currentChar; textBox2.Text = richTextBox1.Text.Substring(currentChar, 1); button1.Enabled = true; } mouseisup = false; } } } private void richTextBox1_MouseUp(object sender, MouseEventArgs e) { if (textBox2.Text == "") { mouseisup = true; button1.Enabled = false; } } private void button1_Click(object sender, EventArgs e) { button1.Enabled = false; string[] text = Parse_Text.ParseText(richTextBox1.Text, positionToSearch, currentChar); for (int i = 0; i &lt; text.Length; i++) { richTextBox2.Text = text[i]; } } </code></pre> <p>What it does now if I have a text in the richTextBox1 for example:</p> <pre><code>Daniel is greater &gt; the the smaller &lt; then &gt;&gt; higher is &lt; Daniel </code></pre> <p>So if I click first time on the first D then I click on the second D</p> <p>The text in richTextBox2 will be:</p> <pre><code>aniel is greater &gt; the the smaller &lt; then &gt;&gt; higher is &lt; </code></pre> <p>If I click on <code>i</code> and then on <code>&gt;</code></p> <p>So the text in richTextBox2 will be now:</p> <pre><code>s greater </code></pre> <p>Until this point everything is working good.</p> <p>The problem is when I click backward for example I click on the last D of Daniel And then i click on D of the first Daniel.</p> <p>Then im getting exception in the new class since :</p> <pre><code>if (startPos &gt;= 0 &amp;&amp; endPos &gt; startPos) </code></pre> <p>And then thevariable entries is null.</p> <p>How do i handle this case when i try to parse backward ? In Form1 i tried some thing but i check if textBox2 is empty and set the bool to true something here stuck me.</p> <pre><code>private void richTextBox1_MouseUp(object sender, MouseEventArgs e) { if (textBox2.Text == "") { mouseisup = true; button1.Enabled = false; } } </code></pre> <p>Since textBox2 is empty it will be always true. But i need to check if text is null the variable text is null then do something:</p> <pre><code>private void button1_Click(object sender, EventArgs e) { button1.Enabled = false; string[] text = Parse_Text.ParseText(richTextBox1.Text, positionToSearch, currentChar); </code></pre> <p>If i check here if text is null and then textBox2 is empty then it will be true all the time the bool variable.</p> <p>Second problem is if I want to allow the user to parse from right to left ?</p> <p>If I mark the first D and the last D its ok.</p> <p>But if first i click on the last D and then the first D its returning null.</p> <p>So the two problems:</p> <ol> <li><p>How to handle the null entries variable if the code is as it is now? If it is null I want that the user will be start over again.</p></li> <li><p>If i want to change the code and allowed to parse from right to left ? What should I change in the new class code ?</p></li> </ol> <p>EDIT**</p> <pre><code>public static string[] ParseText(string text, int startPos, int endPos) { List&lt;string&gt; parsedText = new List&lt;string&gt;(); string[] entries = null; int tempPos = 0; if (startPos &gt; endPos) { tempPos = startPos; startPos = endPos; endPos = tempPos; } if (startPos &gt;= 0 &amp;&amp; endPos &gt; startPos) { string images = text.Substring(startPos + 1, endPos - startPos - 1); entries = images.Split(new[] { ',' }); for (var i = 0; i &lt; entries.Length; i++) { entries[i] = entries[i].Replace("\"", ""); } for (int i = 0; i &lt; entries.Length; i++) { parsedText.Add(entries[i]); } } return entries; } </code></pre> <p>This is the button click event:</p> <pre><code>private void button1_Click(object sender, EventArgs e) { button1.Enabled = false; string[] text = Parse_Text.ParseText(richTextBox1.Text, positionToSearch, currentChar); for (int i = 0; i &lt; text.Length; i++) { richTextBox2.Text = text[i]; } } </code></pre>
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    1. USDoron Muzar
    1. USDoron Muzar
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    1. COIn `button1_Click` some code is missing.
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      1. POTwo problems I can't solve when parsing the text how do i parse to the other way from right to left too?
      1. USDialecticus
    2. COIn button click i should check for text if its null ? Tried but what to do if its null ? I want that if its null it will be like a reset so if i click on a char to the left it will add it to textBox1 and will start all over again. But since i keep clicking on the left to the left its null all the time. And since textBox2 is empty then the bool mouseisup will be true .
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      1. POTwo problems I can't solve when parsing the text how do i parse to the other way from right to left too?
      1. USDoron Muzar
    3. COCurrent code will not compile because the variable `i` is missing in `button1_Click`. Also, last line of code is nested in braces, but is not in any kind of if-for-while-using-try statement, which is suspicious. Like some code is missing.
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      1. POTwo problems I can't solve when parsing the text how do i parse to the other way from right to left too?
      1. USDialecticus
 

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