How can I delete all the items in combo box? [closed] - c#

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I have a ComboBox control with the DropDownStyle properties set to DropDownList. I want to replace the list of items with some new items at some points in the form but it concatenates the new items with the old items. How can I delete the old items and place new items in the combo box?
I am trying something like that:
this.selectAttribute.Items.AddRange(new object[] {
"Airport_Name", //New items
"City",
"Country"});


You could try clearing the items first:
this.selectAttribute.Items.Clear();


Use the .clear() functionality:
this.selectAttribute.Items.clear()

Related

i want add value number to first element of of text box [closed]

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txtpayAmount.Text = gblFunction.ConvertTwoDecimal(
txtpayAmount.Text,
btn.Tag.ToString(),
txtpayAmount.SelectedText.Length);
txtpayAmount.Focus();
txtpayAmount.SelectionStart = txtpayAmount.Text.Length;
This is my code , am trying to add the value of button to textbox but its adding as last element of textbox.I want to add as first element

If I understand correctly (your question is confusing), you want prepend the text in a textbox.
If you want to do so you can do a txtBox.Value = 'ValueToPrepend' + txtBox.Value;

Find items in a string collection which contain another string [closed]

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I have a collection which has strings in it.
Such as:
"iphone x sadasd"
"IPHONE X s325g"
"Another string"
I am adding these strings in a listbox, but not all of them.
I want to add strings into a listbox based on the text entered in a textbox. e.g I might enter the text "iphone x "
So far I have tried:
if(collection.Contains(textBox1.Text));
{
listbox1.items.Add(//string that contains texbox1.text)
}

Use AddRange Method with Where
listbox1.Items.AddRange(collection.Where(x => x.Contains(textBox1.Text));

c# checklistbox check if item is selected [closed]

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It my sound trivial but I can't get around. How do I know if item in checklistbox is selected ? I've got checklistbox with 3 items and I'd like to do some 'if then' statements. Basically ,if chkbox1.Checked Items 'ABC' is selected / checked then..
Thanks

CheckedListBox contains CheckedItems property. You can get all checked items from this collection. Read here: MSDN

got this solved by using
GetItemCheckState(0) == CheckState.Checked
and using 0 first item ,1 second item etc.

How to create images in a Foreach Loop [closed]

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I have a List of objects and i want to create a Foreach loop which create images on my MainWindow separated by 50 pixels for example. I don't know if I have to create them in the desgner itself or if there's a way to create then place the images the one below the other in a command.
For example i have:
List<string> URIS = new List<string>();
foreach (var i in URIS)
{
//New image in MainWindow with source i
}
Remember that I want a "list" of images in my Window so that every image is below the last one.

Look into the ItemsControl. It has an ItemsSource property that takes a list and lays out its items into a visual list. You can use the ItemTemplate property to control exactly what type of visual is created from each list item, including things like spacing.

Combobox text when clearing items [closed]

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I'm dealing with the fact that when I clear items in a combobox programmatically, the text do not change and keep the last selected item.
How can I do it?

Try
comboBox.SelectedIndex = -1;
Or
comboBox.Items.Clear();
comboBox.ResetText();

Another way for combo boxes:
Populate
comboBox1.DataSource = new string[] { "", "bruce", "clark", "tony" };
Clear
comboBox1.DataSource = null;

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