private void btn_Click(object sender, EventArgs e)
{
int quantity = Convert.ToInt32(txtseq.Text);
int[] array = new int[lbox.Items.Count];
if (txtseq.Text.Length > 0)
{
for (int i = 2; i < array.Length; i++)
{
array[0] = 0;
array[1] = 1;
array[i] = array[i--] + array[i];
lbox.Items.Add(array[0].ToString() + array[1].ToString() + array[i].ToString());
}
}
else
MessageBox.Show("Insert something first");
}
Trying to generate a fibonacci sequence and sending it to a listbox item however i dont understand why its not being added to the listbox as a item in the for
In the listView selected index i select item and display the file content in richTextBox:
void lvnf_SelectedIndexChanged(object sender, EventArgs e)
{
if (ListViewCostumControl.lvnf.SelectedItems.Count > 0)
{
richTextBox1.Text = File.ReadAllText(ListViewCostumControl.lvnf.Items[ListViewCostumControl.lvnf.SelectedIndices[0]].Text);
int resultsnumber = 0;
int start = richTextBox1.SelectionStart;
int startIndex = 0;
int index = 0;
string word = textBox1.Text;
Color selectionColor = richTextBox1.SelectionColor;
word = textBox1.Text.Replace("\r\n", "\n");
while ((index = richTextBox1.Text.IndexOf(word, startIndex)) != -1)
{
richTextBox1.Select(index, word.Length);
richTextBox1.SelectionColor = Color.Yellow;
startIndex = index + word.Length;
resultsnumber ++;
}
richTextBox1.SelectionStart = start;
richTextBox1.SelectionLength = 0;
richTextBox1.SelectionColor = selectionColor;
label16.Text = resultsnumber.ToString();
label16.Visible = true;
numericUpDown1.Maximum = resultsnumber;
numericUpDown1.Enabled = true;
}
}
And i have the numericUpDown changedvalue event
private void numericUpDown1_ValueChanged(object sender, EventArgs e)
{
}
for example if i have in the numericUpDown the maximum value of 4 that's 4 results in the richTextBox text.
Each result is in another place in the text.
What i want to do is when i move up down with the numericUpDown it will jump in the richTextBox to the result location in the text.
I think it should be that if the first result started in index 0 and ended in index 20 then jump to this result show this result.
If the third result is started in index 76 and ended in index 83 so if i selected in the numericUpDown the value 3 jump to this result location.
Ok this is what i did now it was quite easy but i have a problem reseting the variable:
It was easy to do it but i have a problem reseting the variables when selecting another item each time in the listView. I want to reset the List and also to set the numericUpDown1 to value 0 when selecting other item. But then it's going to the numericUpDown1_ValueChanged item before it's adding items to the List and throw exception since the List Count and the numericUpDown1 value are 0.
In top of form1 created a new List
private List<int> results = new List<int>();
In the listView selectedindex event:
void lvnf_SelectedIndexChanged(object sender, EventArgs e)
{
if (ListViewCostumControl.lvnf.SelectedItems.Count > 0)
{
richTextBox1.Text = File.ReadAllText(ListViewCostumControl.lvnf.Items[ListViewCostumControl.lvnf.SelectedIndices[0]].Text);
results = new List<int>();
numericUpDown1.Value = 0;
int resultsnumber = 0;
int start = richTextBox1.SelectionStart;
int startIndex = 0;
int index = 0;
string word = textBox1.Text;
Color selectionColor = richTextBox1.SelectionColor;
word = textBox1.Text.Replace("\r\n", "\n");
while ((index = richTextBox1.Text.IndexOf(word, startIndex)) != -1)
{
richTextBox1.Select(index, word.Length);
richTextBox1.SelectionColor = Color.Yellow;
startIndex = index + word.Length;
resultsnumber ++;
results.Add(startIndex);
}
richTextBox1.SelectionStart = start;
richTextBox1.SelectionLength = 0;
richTextBox1.SelectionColor = selectionColor;
label16.Text = resultsnumber.ToString();
label16.Visible = true;
numericUpDown1.Maximum = results.Count -1;
numericUpDown1.Enabled = true;
richTextBox1.SelectionStart = results[(int)numericUpDown1.Value];
richTextBox1.ScrollToCaret();
}
}
In the numericupdown1 valuechanged event
private void numericUpDown1_ValueChanged(object sender, EventArgs e)
{
if (results.Count == 0)
{
MessageBox.Show("Results Count Value is 0 Check It !!!!!");
}
else
{
richTextBox1.SelectionStart = results[(int)numericUpDown1.Value];
richTextBox1.ScrollToCaret();
}
}
When selecting first item in the listView it's fine.
But then when selecting any other item i want that the results List and the numericUpDown will be reset to empty and 0.
The problem is when i set the numericUpDown1 Value to 0 it's jumping to the valuechanged event before it's adding the results to the List so it's giving the exception.
I would like to output only a part of items from listBox1 like:response.response.items[counter].first_name to lable_name.Text. How can I do that?
Part of method:
for (int counter = 0; counter < response.response.items.Count; counter++)
{
listBox1.Items.Add(response.response.items[counter].first_name + " " + response.response.items[counter].last_name + Environment.NewLine);
}
The way I output items to lable:
private void listBox1_DoubleClick(object sender, EventArgs e)
{
int count = listBox1.Items.Count -1;
for (int counter = count; counter >= 0; counter--)
{
if (listBox1.GetSelected(counter))
{
lable_name.Text= listBox1.Items[counter].ToString();
}
}
}
lable_name.Text = listbox1.Items[counter].ToString().Split(' ')[0];
could be one of the options ...
just make sure what charackter are qou spliting on as well as the text in string.
I have a handler for list_box:
private void list_answers_SelectedIndexChanged(object sender, EventArgs e)
{
for (int i = 0; i < tasks.Count; i++)
{
if (list_answers.Text == "Question №" + (i + 1))
{
this.ShowOnePanel(i);
iter = i;
break;
}
}
}
and for list_view:
private void list_answers_SelectedIndexChanged(object sender, EventArgs e)
{
for (int i = 0; i < tasks.Count; i++)
{
if (list_answers.Items[i].Text == "Question №" + (i + 1))
{
this.ShowOnePanel(i);
iter = i;
break;
}
}
}
It works for listbox, but doesn't work for listview. Why?
P.S. ShowOnePanel is my method, that shows one of the panels with question.
if (list_answers.Items[i].Text == "Питання №" + (i + 1))
I guess it's "question" not "Питання"
EDIT
private void list_answers_SelectedIndexChanged(object sender, EventArgs e)
{
for (int i = 0; i < tasks.Count; i++)
{
if (list_answers.Items[i].Selected == true) // find selected item
{
if (list_answers.Items[i].Text == "Question №" + (i + 1)) // check it's content
this.ShowOnePanel(i);
iter = i;
break;
}
}
}
In my RichtextBox, if I have written as below.
This is my pen,
his pen is beautiful.
Now I search word "is" then
output would be as below.
All "is" should be highlighted.
What about:
static class Utility {
public static void HighlightText(this RichTextBox myRtb, string word, Color color) {
if (word == string.Empty)
return;
int s_start = myRtb.SelectionStart, startIndex = 0, index;
while((index = myRtb.Text.IndexOf(word, startIndex)) != -1) {
myRtb.Select(index, word.Length);
myRtb.SelectionColor = color;
startIndex = index + word.Length;
}
myRtb.SelectionStart = s_start;
myRtb.SelectionLength = 0;
myRtb.SelectionColor = Color.Black;
}
}
Looks like this would do it.
http://www.dotnetcurry.com/ShowArticle.aspx?ID=146
int start = 0;
int indexOfSearchText = 0;
private void btnFind_Click(object sender, EventArgs e)
{
int startindex = 0;
if(txtSearch.Text.Length > 0)
startindex = FindMyText(txtSearch.Text.Trim(), start, rtb.Text.Length);
// If string was found in the RichTextBox, highlight it
if (startindex >= 0)
{
// Set the highlight color as red
rtb.SelectionColor = Color.Red;
// Find the end index. End Index = number of characters in textbox
int endindex = txtSearch.Text.Length;
// Highlight the search string
rtb.Select(startindex, endindex);
// mark the start position after the position of
// last search string
start = startindex + endindex;
}
}
public int FindMyText(string txtToSearch, int searchStart, int searchEnd)
{
// Unselect the previously searched string
if (searchStart > 0 && searchEnd > 0 && indexOfSearchText >= 0)
{
rtb.Undo();
}
// Set the return value to -1 by default.
int retVal = -1;
// A valid starting index should be specified.
// if indexOfSearchText = -1, the end of search
if (searchStart >= 0 && indexOfSearchText >=0)
{
// A valid ending index
if (searchEnd > searchStart || searchEnd == -1)
{
// Find the position of search string in RichTextBox
indexOfSearchText = rtb.Find(txtToSearch, searchStart, searchEnd, RichTextBoxFinds.None);
// Determine whether the text was found in richTextBox1.
if (indexOfSearchText != -1)
{
// Return the index to the specified search text.
retVal = indexOfSearchText;
}
}
}
return retVal;
}
// Reset the richtextbox when user changes the search string
private void textBox1_TextChanged(object sender, EventArgs e)
{
start = 0;
indexOfSearchText = 0;
}
This will show all the searched criteria at the same time.
Using: 1 Textbox (to enter the text to search for) and 1 Button (to Run the Search).
Enter your search criteria inside the textbox and press search button.
// On Search Button Click: RichTextBox ("rtb") will display all the words inside the document
private void btn_Search_Click(object sender, EventArgs e)
{
try
{
if (rtb.Text != string.Empty)
{// if the ritchtextbox is not empty; highlight the search criteria
int index = 0;
String temp = rtb.Text;
rtb.Text = "";
rtb.Text = temp;
while (index < rtb.Text.LastIndexOf(txt_Search.Text))
{
rtb.Find(txt_Search.Text, index, rtb.TextLength, RichTextBoxFinds.None);
rtb.SelectionBackColor = Color.Yellow;
index = rtb.Text.IndexOf(txt_Search.Text, index) + 1;
rtb.Select();
}
}
}
catch (Exception ex) { MessageBox.Show(ex.Message, "Error"); }
}
}
}
If you only want to match the whole word you can use this, note that this ignores case and also the |s\b means that plurals get highlighted e.g. Cat matches cats but not caterpiller :
public static void HighlightText(RichTextBox myRtb, string word, Color color)
{
if (word == string.Empty)
return;
var reg = new Regex(#"\b" + word + #"(\b|s\b)",RegexOptions.IgnoreCase);
foreach (Match match in reg.Matches(myRtb.Text))
{
myRtb.Select(match.Index, match.Length);
myRtb.SelectionColor = color;
}
myRtb.SelectionLength = 0;
myRtb.SelectionColor = Color.Black;
}
private void button3_Click(object sender, EventArgs e)
{
if (textBox1.Text != "")
{
for (int i = 0; i < richTextBox1.TextLength; i++)
{
richTextBox1.Find(textBox1.Text, i, RichTextBoxFinds.None);
richTextBox1.SelectionBackColor = Color.Red;
}
}
else
{
for (int i = 0; i < richTextBox1.TextLength; i++)
{
richTextBox1.SelectAll();
richTextBox1.SelectionBackColor = Color.White;
}
}
}[lets make it!][1]
I would do it like that because all the other answers highlight the text, but doesnt change it back after you searched again.
Use the RichText Find Method to find the starting index for the searching word.
public int FindMyText(string searchText, int searchStart, int searchEnd)
{
int returnValue = -1;
if (searchText.Length > 0 && searchStart >= 0)
{
if (searchEnd > searchStart || searchEnd == -1)
{
int indexToText = richTextBox1.Find(searchText, searchStart, searchEnd, RichTextBoxFinds.MatchCase);
if (indexToText >= 0)
{
returnValue = indexToText;
}
}
}
return returnValue;
}
Use a Button or TextChangeListener and Search for your word.
private void button1_Click(object sender, EventArgs e)
{
// Select the first char in your Richtextbox
richTextBox1.SelectionStart = 0;
richTextBox1.SelectionLength = richTextBox1.TextLength;
// Select until the end
richTextBox1.SelectionColor = Color.Black;
// Make the Text Color black
//Use an Inputfield to add the searching word
var word = txtSearch.Text;
//verify the minimum length otherwise it may freeze if you dont have text inside
if (word.Length > 3)
{
int s_start = richTextBox1.SelectionStart, startIndex = 0, index;
while ((index = FindMyText(word, startIndex, richTextBox1.TextLength)) != -1)
{
// goes through all possible found words and color them blue (starting index to end)
richTextBox1.Select(index, word.Length);
richTextBox1.SelectionColor = Color.Blue;
startIndex = index + word.Length;
}
// Color everything between in color black to highlight only found words
richTextBox1.SelectionStart = startIndex;
richTextBox1.SelectionLength = 0;
richTextBox1.SelectionColor = Color.Black;
}
}
I would highly recommend to set a minimum word length to avoid freezing and high memory allocation.