Develop Reference

Adding a new line when checking a checkbox

When I click on a checkbox I want the next checkbox information to be displayed on a new line, I know how to do this with "\r\n" however when unchecking the box and rechecking the box, it adds a new line above the text moving the original text down by 1 line. https://imgur.com/a/IHDDG85
I've tried "\r\n" and Environment.NewLine
private void chkHamburger_CheckedChanged(object sender, EventArgs e)
{
if (chkHamburger.Checked == true)
{
txtHamburger.Enabled = true;
txtHamburger.Text = "";
txtHamburger.Focus();
txtOrder.Text += ("Hamburger");
}
else
{
txtHamburger.Enabled = false;
txtHamburger.Text = "0";
}
if (chkHamburger.Checked == false)
{
txtOrder.Text = txtOrder.Text.Replace("Hamburger", "");
}
}
private void chkCheeseBurger_CheckedChanged(object sender, EventArgs e)
{
if (chkCheeseBurger.Checked == true)
{
txtCheeseBurger.Enabled = true;
txtCheeseBurger.Text = "";
txtCheeseBurger.Focus();
txtOrder.Text += ("Cheese Burger");
}
else
{
txtCheeseBurger.Enabled = false;
txtCheeseBurger.Text = "0";
}
if (chkCheeseBurger.Checked == false)
{
txtOrder.Text = txtOrder.Text.Replace("Cheese Burger", "");
}
}
I want the text of a checkbox to be displayed on a new line but when rechecking the box a whitespace should not appear above it.

I suggest you to use a List<string> where you add or remove your orders. Then it is easy to rebuild the txtOrder data with a single line of code using string.Join
List<string> orders = new List<string>();
private void chkHamburger_CheckedChanged(object sender, EventArgs e)
{
txtHamburger.Enabled = chkHamburger.Checked;
if (chkHamburger.Checked)
{
txtHamburger.Text = "";
txtHamburger.Focus();
orders.Add("Hamburger");
}
else
{
txtHamburger.Text = "0";
orders.Remove("Hamburger");
}
UpdateOrders();
}
private void chkCheeseBurger_CheckedChanged(object sender, EventArgs e)
{
txtCheeseBurger.Enabled = chkCheeseBurger.Checked;
if (chkCheeseBurger.Checked)
{
txtCheeseBurger.Text = "";
txtCheeseBurger.Focus();
orders.Add("Cheese Burger");
}
else
{
txtCheeseBurger.Text = "0";
orders.Remove("Cheese Burger");
}
UpdateOrders();
}
private void UpdateOrders()
{
txtOrders.Text = string.Join(Environment.NewLine, orders);
}

The best way to do this is to have a routine that builds the contents of the text independent of what just happened -- this you could use join or a loop to create the text contents.
Make this a function and call it when the check boxes change. The function loops over all your items and adds them to the output with the formatting and totals etc.

if user start typing in textbox value change to input else if user didn't type any thing value change to an specific string in C#

I have a listview and created a textbox to search itmes in that list!
everything is ok about searching!
but problem is I want my search box to be like this:
at first Searchbox.Text="Search ..." and if user started typing in that searchbox change to that keyword! else(if) searchbox got empty Searchbox.Text change to "Search ..." again!
maybe it's a little complicated! but i tried 1-2 hours on it! and couldn't make it!
I have used Timers,checkboxchange event,booleans,...! but couldn't make it! :(
Please Help!
*my Searchbox name here is textbox1.
Some Codes I tested:
private void textBox1_TextChanged(object sender, EventArgs e)
{
string str = textBox1.Text;
/*
if (!keywordentered_bool)
{
textBox1.Text = "";
}
*/
if (str != "")
{
//Doing Search operations!
search_bool = true;
}
else
{//Doing Search operations!
search_bool = true;
// keywordentered_checkbox.Checked = true;
Searchtextbox_Timer.Interval = 100;
Searchtextbox_Timer.Enabled = true;
Searchtextbox_Timer.Tick += Searchtextbox_Timer_Tick;
//textBox2.Visible = false;
}
}
else
{
if (search_bool)
{
listView1.Items.Clear();
label1.Visible = false;
listView1.Items.AddRange(Originalplaylist_list.ToArray());
if (!search_bool)
{
listView1.Items[MusicLogindex_list[MusicLogindex_list.Count - 1]].ForeColor = Color.Cyan;
}
else if (search_bool)
{//Doing Search operations
search_bool = false;
Searchtextbox_Timer.Interval = 100;
Searchtextbox_Timer.Enabled = true;
Searchtextbox_Timer.Tick += Searchtextbox_Timer_Tick;
//textBox2.Visible = true;
// keywordentered_checkbox.Checked = false;
}
}
void Searchtextbox_Timer_Tick(object sender, EventArgs e)
{
if (!search_bool)
{
textBox2.Visible = true;
textBox2.Location = textBox1.Location;
//textBox1.Text = "Search ...";
//textBox1.ForeColor = Color.Gray;
//textBox1.Font = new Font(textBox1.Font, FontStyle.Italic);
}
else
{
textBox2.Visible = false;
// textBox1.Text = "";
// textBox1.ForeColor = Color.Black;
// textBox1.Font = new Font(textBox1.Font, FontStyle.Regular);
}
Searchtextbox_Timer.Enabled = false;
//throw new NotImplementedException();
}

This is just psuedocode but the concept is there and you need to implement the text change event for searching , you can do additional changes in event handler.
Textbox myTxtbx = new Textbox();
myTxtbx.Text = "Enter text here...";
myTxtbx.OnFocus += OnFocus.EventHandle(RemoveText);
myTxtbx.LoseFocus += LoseFocus.EventHandle(AddText);
public RemoveText(object sender, EventArgs e)
{
myTxtbx.Text = "";
}
public AddText(object sender, EventArgs e)
{
if(string.IsNullorEmpty(myTxtbx.Text))
myTxtbx.Text = "Enter text here...";
}
This is an example shows for a dynamic textbox control, you can add these events to your control and use the same code for make it work.
Or you can use this plugin
Visual Studio gallery plugin
Another plugin you can use for this purpose
Textbox with placeholder
Hope this helps.

thanks to #Frebin Francis my problem solved!
I downloaded the source code from this link TextBox With Placeholder
and added it to my project! then add it to my form and yeah! :)

Button with image and not visible text properties

Can I create a button with both .Image and .Text properties simultaniously, in such way, that text is not visible on form, and is created just for identifying what button should do at the moment?
Using TextAlign and TextImageRelation properties doesn't help. Text is always visible, just a position changes.
private System.Windows.Forms.Button bRenameCourse;
this.bRenameCourse.BackColor = System.Drawing.SystemColors.ButtonFace;
this.bRenameCourse.Image = ((System.Drawing.Image)(resources.GetObject("bRenameCourse.Image")));
this.bRenameCourse.Location = new System.Drawing.Point(966, 6);
this.bRenameCourse.Name = "bRenameCourse";
I want this text "Rename" to be not visible on button
this.bRenameCourse.Text = "Rename";
this.bRenameCourse.Size = new System.Drawing.Size(64, 60);
this.bRenameCourse.TabIndex = 10;
this.bRenameCourse.UseVisualStyleBackColor = false;
this.bRenameCourse.Click += new System.EventHandler(this.bRenameCourse_Click);
Here is why do I want it works :
private void bRenameCourse_Click(object sender, EventArgs e)
{
if (bRenameCourse.Text.Equals("Rename"))
{
//DO SMTHNG
bRenameCourse.Text = "OK";
}
else if (bRenameCourse.Text.Equals("OK"))
{
//DO SMTHNG
bRenameCourse.Text = "Rename";
}
}
I can avoid this using some flags, but I'd like to know if it's possible in general.

Don't use the .Text property of the button to store information.You can use the .Tag property
ie
this.bRenameCourse.Tag = "Rename";
And in the Event
private void bRenameCourse_Click(object sender, EventArgs e)
{
if (bRenameCourse.Tag.Equals("Rename"))
{
//DO SMTHNG
bRenameCourse.Tag = "OK";
}
else if (bRenameCourse.Tag.Equals("OK"))
{
//DO SMTHNG
bRenameCourse.Tag = "Rename";
}
}
Just set the .Text property to ""(blank or empty)

C# Checking if button was clicked

I am making a program that should just continue if 2 conditions are given.
The first one, 2 TextBoxs have the same word in and a Button was clicked, which opens a new Form. Now I have the event for the "complete" button.
private void button2_Click(object sender, EventArgs e)
{
if (textBox2.Text == textBox3.Text && ???)
{
StreamWriter myWriter = File.CreateText(#"c:\Program Files\text.txt");
myWriter.WriteLine(textBox1.Text);
myWriter.WriteLine(textBox2.Text);
}
]
My problem is, I can't find a method that gives something like `button1.Clicked or something similar.
I hope someone can help me here..

Click is an event that fires immediately after you release the mouse button. So if you want to check in the handler for button2.Click if button1 was clicked before, all you could do is have a handler for button1.Click which sets a bool flag of your own making to true.
private bool button1WasClicked = false;
private void button1_Click(object sender, EventArgs e)
{
button1WasClicked = true;
}
private void button2_Click(object sender, EventArgs e)
{
if (textBox2.Text == textBox3.Text && button1WasClicked)
{
StreamWriter myWriter = File.CreateText(#"c:\Program Files\text.txt");
myWriter.WriteLine(textBox1.Text);
myWriter.WriteLine(textBox2.Text);
button1WasClicked = false;
}
}

These helped me a lot: I wanted to save values from my gridview, and it was reloading my gridview /overriding my new values, as i have IsPostBack inside my PageLoad.
if (HttpContext.Current.Request["MYCLICKEDBUTTONID"] == null)
{
//Do not reload the gridview.
}
else
{
reload my gridview.
}
SOURCE: http://bytes.com/topic/asp-net/answers/312809-please-help-how-identify-button-clicked

button1, button2 and button3 have same even handler
private void button1_Click(Object sender, EventArgs e)
{
Button btnSender = (Button)sender;
if (btnSender == button1 || btnSender == button2)
{
//some code here
}
else if (btnSender == button3)
//some code here
}

i am very new to this website. I am an undergraduate student, doing my Bachelor Of Computer Application.
I am doing a simple program in Visual Studio using C# and I came across the same problem, how to check whether a button is clicked?
I wanted to do this,
if(-button1 is clicked-) then
{
this should happen;
}
if(-button2 is clicked-) then
{
this should happen;
}
I didn't know what to do, so I tried searching for the solution in the internet. I got many solutions which didn't help me. So, I tried something on my own and did this,
int i;
private void button1_Click(object sender, EventArgs e)
{
i = 1;
label3.Text = "Principle";
label4.Text = "Rate";
label5.Text = "Time";
label6.Text = "Simple Interest";
}
private void button2_Click(object sender, EventArgs e)
{
i = 2;
label3.Text = "SI";
label4.Text = "Rate";
label5.Text = "Time";
label6.Text = "Principle";
}
private void button5_Click(object sender, EventArgs e)
{
try
{
if (i == 1)
{
si = (Convert.ToInt32(textBox1.Text) * Convert.ToInt32(textBox2.Text) * Convert.ToInt32(textBox3.Text)) / 100;
textBox4.Text = Convert.ToString(si);
}
if (i == 2)
{
p = (Convert.ToInt32(textBox1.Text) * 100) / (Convert.ToInt32(textBox2.Text) * Convert.ToInt32(textBox3.Text));
textBox4.Text = Convert.ToString(p);
}
I declared a variable "i" and assigned it with different values in different buttons and checked the value of i in the if function.
It worked. Give your suggestions if any. Thank you.

how to handle Devexpress WPF TextBox Changed Event?

i am new user in devexpress WPF app. i really want to learn how to detect any changes on textbox event? For example; there are 2 textbox (devexpress) (txt1,txt2) . if i erase values on txt1, txt2 must erase own values.
like that:
private void txt1_KeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Delete)
{
txt2.Text = String.Empty;
}
}
is it true? Can you help me?

If the text of txt2 has to be exactly the same like in txt1, use binding:
<TextBox Name="txt2" Text="{Binding ElementName=txt1, Path=Text}"/>
If you just want to get the changes, try this (using the TextChanged-Event instead of KeyDown, because you also can paste strings into textboxes):
string oldtext = "";
private void TextBox_TextChanged(object sender, TextChangedEventArgs e)
{
string removedstring = "";
string addedstring = "";
TextBox source = (TextBox)e.Source;
TextChange t = e.Changes.First();
if (t.RemovedLength > 0)
{
removedstring = oldtext.Substring(t.Offset, t.RemovedLength);
}
if (t.AddedLength > 0)
{
addedstring = source.Text.Substring(t.Offset, t.AddedLength);
}
oldtext = source.Text;
}
If you want to set txt2.Text = txt1.Text by code
private void TextBox_TextChanged(object sender, TextChangedEventArgs e)
{
TextBox source = (TextBox)e.Source;
TextChange t = e.Changes.First();
string first = txt2.Text.Substring(0, t.Offset);
string added = source.Text.Substring(t.Offset, t.AddedLength);
string last = (t.Offset+1>tbrt.Text.Length)?"":txt2.Text.Substring(t.Offset, txt2.Text.Length-1);
last = last.Remove(0, t.RemovedLength);
txt2.Text = first + added + last;
}