Checking if the correct label was clicked?

Checking if the correct label was clicked? - c#

to start of Im not good at programming and I am completely new to it. With that said, I am trying to make a game, where a pattern of labels show up (by the speciffic labels changing colors), and then the user has to click that speciffic pattern after it has been shown. I have already made the pattern show, and put into a list. The problem I now have is how I am going to check if the correct label was licked, acording to the random pattern that has been made. Sorry if my code seems clumsy, but here it is (sorry that there are no commemts yet also):
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Spil
{
public partial class Form1 : Form
{
Random rnd = new Random();
Label[] labelArray;
int turn = 1;
int lives = 3;
List<Label> orderList = new List<Label>();
public Form1()
{
InitializeComponent();
labelArray = new Label []{ label1, label2, label3, label4, label5, label6, label7, label8, label9 };
}
private void DisplayOrder()
{
for (int i = 0; i < labelArray.Length; i++)
{
labelArray[i].BackColor = Color.Blue;
}
for (int i = -2; i < turn; i++)
{
int chosenNumber = rnd.Next(0, 9);
labelArray[chosenNumber].BackColor = Color.Green;
Thread.Sleep(1000);
labelArray[chosenNumber].BackColor = Color.Blue;
orderList.Add(labelArray[chosenNumber]);
}
}
private void Click0(object sender, EventArgs e)
{
}
private void Click1(object sender, EventArgs e)
{
}
private void Click2(object sender, EventArgs e)
{
}
private void Click3(object sender, EventArgs e)
{
}
private void Click4(object sender, EventArgs e)
{
}
private void Click5(object sender, EventArgs e)
{
}
private void Click6(object sender, EventArgs e)
{
}
private void Click7(object sender, EventArgs e)
{
}
private void Click8(object sender, EventArgs e)
{
}
private void Click9(object sender, EventArgs e)
{
}
private void Form1_Shown(object sender, EventArgs e)
{
System.Timers.Timer t = new System.Timers.Timer(100);
t.Elapsed += t_Elapsed;
t.Start();
}
void t_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
((System.Timers.Timer)sender).Stop();
DisplayOrder();
}
}
}

You can have all your labels registered for the same click event and use the sender parameter to identify the clicked label.
for (int i = 0; i < labelArray.Length; i++)
{
labelArray[i].BackColor = Color.Blue;
labelArray[i].Click += label_Click;
}
void label_Click(object sender, EventArgs e)
{
string name = ((Label)sender).Name;
}

You need to generate the Click even for each individual label,you can find the events tab here with the properties tab (in case you didn't know).Simply lick your label in the designer and navigate to the label_click event and double click it.

Related

How to change textbox text automatically when other textbox text changes?

I have these textboxes named bags,rate,quantity,packing size and amount what i want to do is that when user enters bags and rate and packing size the quantity textbox should automatically shows the corresponding quantity and amount but in my case when i click on calculate button then it calculates and show the quantity and amount i have tried using textchanged event but it does not do the job?
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Login
{
public partial class Sale : Form
{
SaleCalci sale;
SaleBillheader SaleHeaderModel = new SaleBillheader();
tbl_SaleBillDetails SaleDetailModel = new tbl_SaleBillDetails();
public Sale()
{
InitializeComponent();
}
private void Cancelbtn_Click(object sender, EventArgs e)
{
clear();
}
private void clear()
{
txtBillNo.Text = txtDesc.Text = "";
txtBags.Text = txtQty.Text = txtRate.Text = txtAmt.Text = "0.00";
if(txtQty.Text !=null && txtAmt.Text !=null )
{
txtQty.Text = "0.00";
txtAmt.Text = "0.00";
}
Savebtn.Text = "Save";
SaleHeaderModel.SaleBillHeaderId = 0;
SaleDetailModel.SaleBill_Id = 0;
}
private void Exitbtn_Click(object sender, EventArgs e)
{
var result = MessageBox.Show("Are you sure you want to close this form ?", "Confirm", MessageBoxButtons.YesNo);
if (result == DialogResult.Yes)
{ this.Close(); }
}
private void Sale_Load(object sender, EventArgs e)
{
ItemCombo();
PartyCombo();
PackingSizeCombo();
// clear();
}
private void ItemCombo()
{
UserDataEntities db = new UserDataEntities();
Itembox.DataSource = db.tbl_ItemId.ToList();
Itembox.ValueMember = "ItemId";
Itembox.DisplayMember = "ItemName";
}
private void PartyCombo()
{
UserDataEntities db = new UserDataEntities();
PartyBox.DataSource = db.tbl_Parties.ToList();
PartyBox.ValueMember = "Id";
PartyBox.DisplayMember = "PartyName";
}
private void PackingSizeCombo()
{
UserDataEntities db = new UserDataEntities();
PackingBox.DataSource = db.PackingSizes.ToList();
PackingBox.ValueMember = "PackingSizeId";
PackingBox.DisplayMember = "PackingSize1";
}
private void Savebtn_Click(object sender, EventArgs e)
{
CalculateAmount();
DisplayAmt();
}
private void CalculateAmount()
{
int bags = 0;
decimal rate = 0;
int pksize = 0;
bags = Convert.ToInt32(txtBags.Text);
rate = Convert.ToDecimal(txtRate.Text);
pksize = Convert.ToInt32(PackingBox.Text);
sale = new SaleCalci(bags,rate, pksize);
//sale.Bags = Convert.ToInt32(txtBags.Text);
//sale.Rate = Convert.ToDecimal(txtRate.Text);
//SaleDetailModel.Bags = int.Parse(txtBags.Text.Trim());
//SaleDetailModel.Qty = Convert.ToDecimal(txtQty.Text.Trim());
//SaleDetailModel.Rate = Convert.ToDecimal(txtRate.Text.Trim());
// SaleDetailModel.Amount = amount;
}
private void txtAmt_TextChanged(object sender, EventArgs e)
{
// txtAmt.Text = sale.CalucalteAmt.ToString();
}
private void Sale_Click(object sender, EventArgs e)
{
if ((txtBags.Text == "0.00") && (txtQty.Text == "0.00")&&(txtRate.Text == "0.00")&& (txtAmt.Text =="0.00"))
{
txtAmt.Clear();
txtBags.Clear();
txtQty.Clear();
txtRate.Clear();
}
}
private void txtQty_TextChanged(object sender, EventArgs e)
{
DisplayAmt();
}
private void txtBags_TextChanged(object sender, EventArgs e)
{
// sale.Bags = Convert.ToInt32(txtBags.Text);
// DisplayAmt();
}
private void PackingBox_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void txtRate_TextChanged(object sender, EventArgs e)
{
// DisplayAmt();
}
private void DisplayAmt()
{
decimal _amt = sale.CalucalteAmt;
txtQty.Text = sale.CalculateQty().ToString();
txtAmt.Text = _amt.ToString();
}
}
}

Normally "TextChanged" event fires autamatically if text value changes.
So here the problem is i think about your other "partial class" in which there has to exist eventhandler work. Something like:
txtBags.TextChanged += new EventHandler(txtBags_TextChanged);
Please check your other partial class if this staement exist.
This eventhandler sometimes disappears from project if you move your gui elements or for some other causes...
You can readd this statement manually.
By the way if you have not experience with the other partial class then you can try to remove these textboxes and re-add them then your problem will autamatically solves.

You need to call DisplayAmt in the TextChanged event of txtBags , txtRate and Size. In the code above, call to DisplayAmt is commented out. Instead, you are calling DisplayAmt in the TextChanged event of txtQty.
You should be, instead doing.
private void txtAmt_TextChanged(object sender, EventArgs e)
{
DisplayAmt();
}
private void txtRate_TextChanged(object sender, EventArgs e)
{
DisplayAmt();
}
Similarly, you need to add Changed event for Text Control for Size. The txtQty is updated by the DisplayAmt() method. So you don't necessarily need it, unless for reasons that are not specified in OP.

Bunifu cannot access non-static property Visible

I have been trying to make a menu which has 3 tabs. Login, News and website. I created user control and named it LoginTab.cs now I put the login panels in there LoginTab.cs, NewsTab. Now I am trying to make it visible and invisible depending on what tab people click. So if someone clicks news then the LoginTab goes away and shows the News tab. My problem is that I can't used LoginTab.Visible because its showing me "Cannot access non-static property 'Visible' in static context. How would I do this?
Main.cs
using System;
using System.Windows.Forms;
using UHWID;
namespace AnixLoader
{
public partial class Main : Form
{
bool username;
bool usergroup;
String SimpleUID = UHWIDEngine.SimpleUid;
String AdvancedUID = UHWIDEngine.AdvancedUid;
public Main()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void Panel2_Paint(object sender, PaintEventArgs e)
{
}
private void Panel1_Paint(object sender, PaintEventArgs e)
{
}
private void Sdads_Click(object sender, EventArgs e)
{
}
private void PictureBox2_Click(object sender, EventArgs e)
{
}
private void CloseMenu_Click(object sender, EventArgs e)
{
Environment.Exit(0); // Closes Menu
}
private void BunifuFlatButton1_Click(object sender, EventArgs e)
{
LoginTab.Visible = true;
NewsTab.Visible = false;
}
private void News_Click(object sender, EventArgs e)
{
LoginTab.Visible = false;
NewsTab.Visible = true;
}
private void BtnMenu_Click(object sender, EventArgs e)
{
if (sidemenu.Width == 60)
{
//EXPAND
// 1. Expand the panel , w = 300
// 2. Show Logo
sidemenu.Visible = false;
sidemenu.Width = 300;
PanelAnimator.ShowSync(sidemenu);
LogoAnimator.ShowSync(Anix_Logo);
}
else
{
//MINIMIZE
//Using Bunifu Animator
// 1. Hide the logo
// 2. Slide the panel, w = 60
LogoAnimator.Hide(Anix_Logo);
sidemenu.Visible = false;
sidemenu.Width = 60;
PanelAnimator.ShowSync(sidemenu);
}
}
private void MainPanel_Paint(object sender, PaintEventArgs e)
{
}
}
}
LoginTab.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace AnixLoader
{
public partial class LoginTab : UserControl
{
public LoginTab()
{
InitializeComponent();
}
private void LoginTab_Load(object sender, EventArgs e)
{
}
private void LoginText_Click(object sender, EventArgs e)
{
}
private void bunifuImageButton1_Click(object sender, EventArgs e)
{
}
private void Login_Click(object sender, EventArgs e)
{
}
private void Password_Click(object sender, EventArgs e)
{
}
}
}

I have resolved the problem by changing from this
private void BunifuFlatButton1_Click(object sender, EventArgs e)
{
LoginTab.Visible = true;
NewsTab.Visible = false;
}
private void News_Click(object sender, EventArgs e)
{
LoginTab.Visible = false;
NewsTab.Visible = true;
}
to this
private void BunifuFlatButton1_Click(object sender, EventArgs e)
{ // Log in button
this.MainPanel.Controls.Clear();
this.MainPanel.Controls.Add(new LoginTab());
}
private void News_Click(object sender, EventArgs e)
{ // News button
this.MainPanel.Controls.Clear();
this.MainPanel.Controls.Add(new NewsTab());
}

C# Button Click and Private Variables

So I'm trying to make a window forms guess the number game, simple but when I click guess no matter what the label goes up by one. I think it may be due to my variables as despite having them global userGuess still comes up as a local variable...`
Commenting out userScore removes the problem, but I still do not understand why the logic is failing
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing;
namespace Guess_The_Number_Form
{
public partial class Form1 : Form
{
private int userScore;
private int randNum;
private int userGuess;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
txtBoxGuess.Hide()
;
}
private void toolTip1_Popup(object sender, PopupEventArgs e)
{
}
private void btnRandom_Click(object sender, EventArgs e)
{
Random rand = new Random();
int randNum = rand.Next(0, 10);
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
userGuess = Convert.ToInt32(txtBoxGuess.Text);
}
private void txtBoxGuess_Enter(object sender, EventArgs e)
{
}
private void btnGuess_Click(object sender, EventArgs e)
{
if (userGuess == randNum)
{
// userScore++;
lbluserScore.Text = userScore.ToString();
lbluserScore.Text = $"{userScore}";
}
else if (userGuess != randNum)
{
userScore--;
lbluserScore.Text = userScore.ToString();
lbluserScore.Text = $"{userScore}";
}
else if (userScore < 0)
{
lbluserScore.Text = Color.Red.ToString();
}
}
}
}

You need to change this:
private void btnRandom_Click(object sender, EventArgs e)
{
Random rand = new Random();
int randNum = rand.Next(0, 10);
}
to
private void btnRandom_Click(object sender, EventArgs e)
{
Random rand = new Random();
randNum = rand.Next(0, 10);
}
That way, you'll set the member variable randNum rather than a local variable randNum. You also want to check that you really are assigning the user-inputted value into userGuess properly. My guess is that it's not, which means you never change the value of either of those variables, and the program thinks the user always guessed the right value.

How control opened tab in my web browser application?

Hi I'm new on C# and I made some simple Web Browser with tabs.
My problem is I don't know how to control selected tab. I mind if i click to back it go back on the selected tab.
Sorry for my bad English. This is my code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace HardRam
{
public partial class Form1 : Form
{
int i = 1;
public Form1()
{
InitializeComponent();
}
private void toolStripButton1_Click(object sender, EventArgs e)
{
webBrowser1.GoBack();
}
private void toolStripButton2_Click(object sender, EventArgs e)
{
webBrowser1.GoForward();
}
private void toolStripButton3_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("http://www.google.com");
}
private void toolStripButton4_Click(object sender, EventArgs e)
{
webBrowser1.Refresh();
}
private void toolStripButton5_Click(object sender, EventArgs e)
{
webBrowser1.Stop();
}
private void button1_Click(object sender, EventArgs e)
{
webBrowser1.Navigate(textBox1.Text);
}
private void button3_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("http://www.google.com/search?&q=" + textBox2.Text);
}
private void label2_Click(object sender, EventArgs e) { }
private void toolStripLabel1_Click(object sender, EventArgs e) { }
private void toolStripButton7_Click(object sender, EventArgs e)
{
TabPage newTp = new TabPage();
WebBrowser newWB = new WebBrowser();
newWB.Name = "Page" + tabControl1.TabPages.Count + 1;
newWB.Dock = DockStyle.Fill;
newWB.Url = new Uri(#"http://www.google.com");
newTp.Controls.Add(newWB);
tabControl1.TabPages.Add(newTp);
}
private void toolStripButton8_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("http://www.google.com/search?&q=" + textBox2.Text );
}
}
}

You make an instance of web-browser for each tab,so you have to get current tab and its web-browser control , so in.see my following example:
private void btnaddtab_Click(object sender, EventArgs e)
{
TabPage newTp = new TabPage();
WebBrowser newWB = new WebBrowser();
newWB.Name = "Page" + tabControl1.TabPages.Count + 1;
newWB.Dock = DockStyle.Fill;
newWB.Url = new Uri(#"http://www.bing.com");
newTp.Controls.Add(newWB);
tabControl1.TabPages.Add(newTp);
}
private void btnback_Click(object sender, EventArgs e)
{
(tabControl1.TabPages[tabControl1.SelectedIndex].Controls[0] as WebBrowser).GoBack();
}
private void btnforward_Click(object sender, EventArgs e)
{
(tabControl1.TabPages[tabControl1.SelectedIndex].Controls[0] as WebBrowser).GoForward();
}

Problem with appendText in c#

I have an app that has 3 text boxes, (users name, what company they are from, and who they are visiting) A button to print, and a keyboard on the screen (monitor is touch screen). I have everything working and functioning...
BUT, the one thing that does not work is when the user points to previous character in the text box that has already been typed, the buttons that "AppendText" (keyboard) do not start typing where the user pointed but it continues typing at the end of what has been typed.
Is this because of "AppendText" or some other issue that I have in my code?
I also am trying to get the first text box (Name_Box) to be sent to form one, which then will be split into two labels (1, first name| 2, last name) right now I have it being sent to one label But I want to split it so the first name is stacked above the second name in the next form (which is printed out).
Thank you so much.
Here is my code: First Form
using System;
using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Printing;
using System.IO;
namespace SMART
{
public partial class Form1 : Form
{
private TextBox tbSelected; // Last focused TextBox
private int posCaret; // Caret position
private int selLength; // Selection length
public Form1()
{
InitializeComponent();
// We will use leave event for textboxes
Name_Box.Leave += new System.EventHandler(textBox_Leave);
Company_Box.Leave += new System.EventHandler(textBox_Leave);
Visiting_Box.Leave += new System.EventHandler(textBox_Leave);
// Set initial selection to the first textbox
Name_Box.Select();
tbSelected = Name_Box;
posCaret = 0;
selLength = 0;
}
// Leave event handler
private void textBox_Leave(object sender, EventArgs e)
{
// Remember the last focused thextbox,
// the caret position in it and the selection length
tbSelected = (TextBox)sender;
posCaret = tbSelected.SelectionStart;
selLength = tbSelected.SelectionLength;
}
// Helper method to restore selection
private void RestoreLastSelection()
{
tbSelected.Select();
posCaret = tbSelected.SelectionStart;
selLength = tbSelected.SelectionLength;
}
private void Form1_Load(object sender, EventArgs e)
{
label5.Text = DateTime.Now.ToString();
}
private void button1_Click(object sender, EventArgs e)
{
label5.Text = DateTime.Now.ToString();
Form2 frm = new Form2(Name_Box.Text);
frm.Show();
frm.Close();
StreamWriter sw;
sw = File.AppendText ("C:\\SignIn.txt");
sw.WriteLine ("Date and Time: " + label5.Text + " | Name: " + Name_Box.Text + " | Company: " + Company_Box.Text + " | Visiting: " + Visiting_Box.Text + " |");
sw.Close ();
Name_Box.Clear();
Company_Box.Clear();
Visiting_Box.Clear();
}
private void button42_Click(object sender, EventArgs e)
{
//SPACE BAR
tbSelected.AppendText(" ");
}
private void button24_Click(object sender, EventArgs e)
{
//DELETE
string t = tbSelected.Text;
if (t.Length > 0)
{
tbSelected.Text = t.Remove(t.Length - 1);
}
}
private void button12_Click(object sender, EventArgs e)
{
tbSelected.AppendText("-");
}
private void button13_Click(object sender, EventArgs e)
{
tbSelected.AppendText("Q");
}
private void button14_Click(object sender, EventArgs e)
{
tbSelected.AppendText("W");
}
private void button15_Click(object sender, EventArgs e)
{
tbSelected.AppendText("E");
}
private void button16_Click(object sender, EventArgs e)
{
tbSelected.AppendText("R");
}
private void button17_Click(object sender, EventArgs e)
{
tbSelected.AppendText("T");
}
private void button18_Click(object sender, EventArgs e)
{
tbSelected.AppendText("Y");
}
private void button19_Click(object sender, EventArgs e)
{
tbSelected.AppendText("U");
}
private void button20_Click(object sender, EventArgs e)
{
tbSelected.AppendText("I");
}
private void button21_Click(object sender, EventArgs e)
{
tbSelected.AppendText("O");
}
private void button22_Click(object sender, EventArgs e)
{
tbSelected.AppendText("P");
}
private void button25_Click(object sender, EventArgs e)
{
tbSelected.AppendText("A");
}
private void button26_Click(object sender, EventArgs e)
{
tbSelected.AppendText("S");
}
private void button27_Click(object sender, EventArgs e)
{
tbSelected.AppendText("D");
}
private void button28_Click(object sender, EventArgs e)
{
tbSelected.AppendText("F");
}
private void button29_Click(object sender, EventArgs e)
{
tbSelected.AppendText("G");
}
private void button30_Click(object sender, EventArgs e)
{
tbSelected.AppendText("H");
}
private void button31_Click(object sender, EventArgs e)
{
tbSelected.AppendText("J");
}
private void button32_Click(object sender, EventArgs e)
{
tbSelected.AppendText("K");
}
private void button33_Click(object sender, EventArgs e)
{
tbSelected.AppendText("L");
}
private void button35_Click(object sender, EventArgs e)
{
tbSelected.AppendText("Z");
}
private void button36_Click(object sender, EventArgs e)
{
tbSelected.AppendText("X");
}
private void button37_Click(object sender, EventArgs e)
{
tbSelected.AppendText("C");
}
private void button38_Click(object sender, EventArgs e)
{
tbSelected.AppendText("V");
}
private void button39_Click(object sender, EventArgs e)
{
tbSelected.AppendText("B");
}
private void button40_Click(object sender, EventArgs e)
{
tbSelected.AppendText("N");
}
private void button41_Click(object sender, EventArgs e)
{
tbSelected.AppendText("M");
}
private void button2_Click_1(object sender, EventArgs e)
{
tbSelected.AppendText("'");
}
private void button3_Click(object sender, EventArgs e)
{
tbSelected.Clear();
}
}
}
Heres is my code: Second Form
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Printing;
namespace SMART
{
public partial class Form2 : Form
{
public Form2(string strTextBox)
{
InitializeComponent();
label3.Text = strTextBox;
}
private void Form2_Load(object sender, EventArgs e)
{
label1.Text = DateTime.Now.ToString();
PrintDocument pd = new PrintDocument();
Margins margins = new Margins(0, 0, 0, 0);
pd.DefaultPageSettings.Margins = margins;
pd.PrintPage += new PrintPageEventHandler(PrintImage);
pd.Print();
/*
//My sad attempt at splitting the Name
var fullname = strTextBox;
var names = fullname.Split (" ");
label3.Text = names[0];
label5.Text = names[1];
*/
}
void PrintImage(object o, PrintPageEventArgs e)
{
int x = SystemInformation.WorkingArea.X;
int y = SystemInformation.WorkingArea.Y;
int width = this.Width;
int height = this.Height;
Rectangle bounds = new Rectangle(x, y, width, height);
Bitmap img = new Bitmap(width, height);
this.DrawToBitmap(img, bounds);
Point p = new Point(0, 0);
e.Graphics.DrawImage(img, p);
}
}
}

You're right in that your problem is the use of AppendText, which always appends to the end (that's what append means).
You need to Insert the character at the current carat position.
You might do better to post a message that simulates a keypress from a physical keyboard.

If you want to insert text at the user's current position, you can use SelectedText. This will replace the current selection (if the user has selected characters):
tbSelected.SelectedText = "V";
Edit: The problem is in here:
private void button24_Click(object sender, EventArgs e)
{
//DELETE
string t = tbSelected.Text;
if (t.Length > 0)
{
tbSelected.Text = t.Remove(t.Length - 1);
}
}
You set the text, which returns the cursor to the beginning of the textbox. You should set tbSelected.SelectionStart after you clear the text.

Develop Reference

C# (C-Sharp) is a programming language developed by Microsoft that runs on the .NET Framework.

Checking if the correct label was clicked? - c#

You need to generate the Click even for each individual label,you can find the events tab here with the properties tab (in case you didn't know).Simply lick your label in the designer and navigate to the label_click event and double click it.

Related

How to change textbox text automatically when other textbox text changes?

Bunifu cannot access non-static property Visible

C# Button Click and Private Variables

How control opened tab in my web browser application?

Problem with appendText in c#

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