hi how to use combo box selected item

Question

hi how to use combo box selected item

Harry Potter 21

hi im beginner of c#
and i want to select my item but i got error

heres my code
if (comboBox1.SelectedItem "test";)

heres the error
Cannot implicitly convert type 'object' to 'bool'

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Answer 1

Hi @Harry Potter ,
According to ComboBox.SelectedText Property.

When the combo box loses focus, the selection point moves to the beginning of the text and any selected text becomes unselected. In this case, getting the SelectedText property retrieves an empty string, and setting the SelectedText property adds the specified value to the beginning of the text.

So you might need metroComboBox1.SelectedItem = "Oxygen Api" or metroComboBox1.SelectedItem.toString = "Oxygen Api".
Best Regards.
Jiachen Li

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Answer 2

Karen Payne MVP 35,586 Volunteer Moderator

Use this

if (comboBox1.SelectedText == "test")  
{  
      
}  
else  
{  
      
}

Harry Potter 21 Reputation points

2022-11-09T13:46:22.733+00:00

hi i used it and it didnt work

if (metroComboBox1.SelectedText == "Oxygen Api")
{
MessageBox.Show("Succusfull!");
}
else
{
MessageBox.Show("Select Api first");
}
theres no error but i selected oxygen api and it says select api first

Karen Payne MVP 35,586 Volunteer Moderator

I used a standard ComboBox and tested even though I knew it would work, Here is a simple example

var text = "Oxygen Api";  
comboBox1.Items.AddRange(new object[] {"EF Core", text, "Test" });  
comboBox1.SelectedIndex = 1;  
MessageBox.Show(comboBox1.Text == text ?   
    "Got it" :   
    $"{text} is not the selected item");

Here is an example I did for another post which finds a string case insensitive using actually more than need as FindString method is an easier way to go.

private void FindButton_Click(object sender, EventArgs e)  
{  
  
    cmbAnimals.Items.AddRange(new object[]{"dog", "cat", "Horse"});  
  
    var result = cmbAnimals  
        .Items  
        .Cast<string>().Select((item, index)   
            => new { Text = item.Trim(), Index = index })  
        .FirstOrDefault(x =>   
            string.Equals(x.Text, tbAnimal.Text,   
                StringComparison.CurrentCultureIgnoreCase));  
  
    if (result is not null)  
    {  
        cmbAnimals.SelectedIndex = result.Index;  
        MessageBox.Show($@"{tbAnimal.Text} was located case insensitive at index {result.Index}");  
    }  
    else  
    {  
        MessageBox.Show($@"{tbAnimal.Text} not located");  
    }  
}

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hi how to use combo box selected item

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