I am very new to coding, so this is likely a simple answer. I am trying to get my GUI button in C# to display the total of an arithmetic function I wrote. For example:
int totalGold = goldOnHand + earnedGold;
I have tried to display the totalGold as such in a text box name TxtGold:
private void BtnSplit_Click(object sender, EventArgs e) {
TxtGold.Text = "totalGold";
}
The text box only displays: totalGold
How do I get the textbox to display the integer that represents the total amount of gold instead of the phrase totalGold?
Thanks for any help from someone willing to give a hand to a noob!
In this code
int totalGold = goldOnHand + earnedGold;
You created a variable called totalGold. And you want to display it in a text box. That's so far so good. But when you try to set the text, things went wrong. You set the text of the text box to "totalGold".
In C#, "" means a string literal. Its value is "What you see is what you get". So when you say "totalGold", it displays the word totalGold. What you need to do is to remove the "" so that totalGold turns into a variable.
TxtGold.Text = totalGold;
But totalGold is an integer! you can only set the text of a text box using a string! How to convert from an integer to a string? Simple, use the ToString() method!
TxtGold.Text = totalGold.ToString();
Turn it into a string using the ToString() method:
TxtGold.Text = totalGold.ToString();
WHY:
What you were doing is setting the text of the button to a string literal, not the value of the variable.
Additionally, you cannot set TxtGold.Text to the integer, because it is a string property (see MSDN). Therefore, you have to do a ToString() to convert the integer to a string.
TxtGold.Text = "totalGold"; will print the string "totalGold" in your text box. If you need to print the integer value assigned to variable totalGold you have to print it as shown below
TxtGold.Text = totalGold.ToString();//that is, avoid the double quotes
the full code might be as follows
private void BtnSplit_Click(object sender, EventArgs e) {
int totalGold = goldOnHand + earnedGold;
TxtGold.Text = totalGold.ToString();
}
Related
i was making a visual studio program that automatically solve some kind of math problems. then i keep failing to convert text from textbox in window form. so i tried every way i found in google to convert string to int but still don't work. so i was looking for solution here but i could't know why this is broken
three textbox is named coefficient_of_absolute, x_coefficient, constant.
and this is part of my code that supposed to convert text of textbox to number
MessageBox.Show(coefficient_of_absolute.Text);
MessageBox.Show(coefficient_of_absolute.Text.GetType().ToString());
int coa_int = Convert.ToInt32(coefficient_of_absolute.Text);
one messagebox showed that text is 1 and the other showed that type of the text is string
but this program say that Input string is malformed
this text is satan. it stole more than 10hours of my life. please help me
edit)
MessageBox.Show(coefficient_of_absolute.Text);
MessageBox.Show(coefficient_of_absolute.Text.GetType().ToString());
int coa_int = int.Parse(coefficient_of_absolute.Text);
it didn't work
MessageBox.Show(coefficient_of_absolute.Text);
MessageBox.Show(coefficient_of_absolute.Text.GetType().ToString());
int output;
int.TryParse(coefficient_of_absolute.Text, out output);
MessageBox.Show(output.ToString());
this made num to zero whatever it is
enter image description here
MessageBox.Show(coefficient_of_absolute.Text.Length.ToString());
cheaking around text revealed length of the text is 1, which means there was nothing around it
you can try TryParse instead of Convert.ToInt32 , that way you can check if you catch exception.
int outputNumber;
bool res = int.TryParse(text1, out outputNumber);
if (res == false)
{
// String is not a number.
}
string textBoxString = textBox1.Text.ToString();
int textBoxInt = int.Parse(textBoxString);
int test = textBoxInt + 1;
string testText = test.ToString();
MessageBox.Show(testText);
converting the variable into string first then converting into int solved this problem
Ok guys, I have a ListBox which displays products (they are a custom class and have ID, name, price) that are in a binding list.. I want the ListBox to display the item name AND the price. The listbox (lbProductsChosen) has "DataTextField" set to the Name and DataValueField set to the ID. I am using the PreRender event to check each Item, look at its price from the binding list (blProducts) etc. and it works great. I get the name and price displayed in the list with this. However, when it is displayed, despite me formatting it using String.Format, the result is still a decimal number (ex. 3.20000) and it just looks ugly. Does anyone know why its working to display it, but not displaying it how I want it formatted.
protected void lbProductsChosen_PreRender(object sender, EventArgs e)
{
foreach (ListItem item in lbProductsChosen.Items)
{
string currentDescription = item.Text;
int convertedValue = Convert.ToInt32(item.Value);
for (int i = 0; i < blProducts.Count; i++)
{
if (blProducts[i].ProductID == convertedValue)
{
decimal ItemPrice = blProducts[i].Price;
string convertedPrice = ItemPrice.ToString();
string currentPrice = String.Format("{0:c}", convertedPrice);
string currentDescriptionPadded = currentDescription.PadRight(30);
item.Text = currentDescriptionPadded + currentPrice;
}
}
}
}
MSDN states the following about the String.Format method.
Generally, objects in the argument list are converted to their string representations by using the conventions of the current culture, which is returned by the CultureInfo.CurrentCulture property.
If you use the currency format specifier c it will use the currency format which is defined in the system settings. Take a look under control panel -> region -> additional settings -> currency. Maybe you have messed up settings there.
If you want to ignore the local settings which would make sense for currency you could do the following. (example in dollar with allways two decimal places)
decimal price = 12.10999999m;
String.Format("${0:0.00}", price);
$12.10
Be aware of that String.Format doesn't round the number correctly but just cuts it off.
In my report, I have a tablix. Now I want to show the numeric data in f3 format. I have set text box property of the tablix column to number and with three decimal points.
Now when the data is e.g. 12.120 then it shows me 12.12 instead of 12.120.
And I want to show when the data is like 12 to 12.000.
How to do it?
double d = 12.20;
Console.WriteLine(d.ToString("0.000", new CultureInfo("en-US", false)));
First off, here's your reference material.
You can use those format strings, or the placeholder style.
Examples:
Double value = 12.20D;
String str1 = String.Format("{0:F3}", value);
String str2 = value.ToString("F3");
String str3 = value.ToString("0.000");
To make this work with your TextBox, however, you will need to pass the entered values through a routine that applies said formatting.
Using the TextBox's Validated method is a good choice because it is fired after editing is complete, and not while the user is still typing (like TextChanged would):
private void textBox1_Validated(Object sender, EventArgs e)
{
Double dbl;
if (!String.IsNullOrWhiteSpace(textBox1.Text) &&
Double.TryParse(textBox1.Text, out dbl))
{
//Replace with your formatting of choice...
textBox1.Text = String.Format("{0:F3}", dbl);
}
}
You have to set TextBox.Format property to f3.
OK I have a text box with a set value, I only want this set value sent if the text box is not filled in on completion of form.
code
dontaion_euro.Text = "99.00";
problem is when I click send it only sends the data 99.00 I only want this sent if blank.
how could I achieve this?
Step1 : you need to Trim the Textbox value to remove the white spaces.
Step2 : you can compare the Textbox value with Empty String to check whether Textbox value is Empty or not
Try this:
if(donation_euro.Text.Trim().Equals(""))
{
donation_euro.Text="99.00";
}
If I understand correctly, you can use String.IsNullOrEmpty method like;
Indicates whether the specified string is null or an Empty string.
if(string.IsNullOrEmpty(dontaion_euro.Text))
{
dontaion_euro.Text = "99.00";
}
else
{
//Your textbox is not null or empty
}
How to update the text from the TextBox control?
Consider a TextBox that already contains the string "Wel"
To insert text in the TextBox, I use:
TextBox1.Text = TextBox1.Text.Insert(3, "come")
And to remove characters from the TextBox:
TextBox1.Text = TextBox1.Text.Remove(3, 4)
But I need to be able to do this:
TextBox1.Text.Insert(3, "come");
TextBox1.Text.Remove(3, 4);
However, this code doesn't update the TextBox.
It this possible?
Can this be accomplished via the append method?
Text property of TextBox is of type string which is immutable it's not possible to change the existing string. Insert() or Remove() returns a new instance of string with the modification and you will have to assign this new instance back to TextBox's Text property.
There is TextBox.AppendText() that you might be interested in. It appends text to the end of the string but you cannot do anything like Insert() or Remove() with it though.
EDIT:
for your keypress, you could do something like this
char charToReplace = (char) (e.KeyChar + 1); // substitute replacement char
textBox1.SelectedText = new string(charToReplace,1);
e.Handled = true;
'string' is a immutable type, so each time string value changes new memory is allocated. So if you want to insert or remove text from TextBox, you have to assign it back to TextBox.Text property. However, if you just want to append text to the TextBox.Text, you can do
textBox.AppendText("Hello");