ComboBox get Value

you can use

listBox1.SelectedItem.Value

ASKER

???
listBox1 is a box with text in. I want the value of the comboBox.

i tried what you said but there are no listbox1.selectedItem.VALUE

try this

comboBox2.SelectedValue

ASKER

private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
{
listBox1.Items.Clear();
string temp;
int selectedValue = (int)comboBox2.SelectedValue;

then I get a nullreferenceExceptoion was unhandled.
Is this becuase the combobox was empty from the begining? Or why do I get it? In that case how do I handle this to be correct instead.

try this
does it work

private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
{
            listBox1.Items.Clear();
            string temp;
            string selectedText = comboBox2.SelectedItem.Text.ToString();
            string sSelectedClient = comboBox2.SelectedItem.Value.ToString();
           
                for (int i = 0; i < booking.Rows; i++)
                {
                    for (int j = 0; j < booking.Cols; j++)
                    {
                        temp = "This is a test"
                        listBox1.Items.Add(temp);
                    }
                }            
} //end typeOfEquimpment_SelectedIndexChanged

Open in new window

this will work for you

if(comboxBox2.SelectedIndex>=0)
selectedValue = (int)comboBox2.SelectedValue;

ASKER

Neither of the two last comments work.

praveenvenu: get the nullreferenceExceptoion was unhandled

ragi: I get object does not contain a definition for TEXT and VALUE

Must the combobox2 be initialized in here?

public Form1()
{
InitializeComponent();
lettersRadioButton.Checked = true;
}

or it is ok that it is empty and when I choose what I want it goes into comboBox2_SelectedIndexChanged

in which line you getting nullreferenceExceptoion

try this one
if(comboxBox2 != null && comboxBox2..SelectedIndex != -1)
{
MessageBox.Show("Inside selected value");
string selectedText = comboBox2.SelectedText.ToString();
string sSelectedClient = comboBox2.SelectedValue.ToString();
}
else
{
MessageBox.Show("Something wrong");
}

if combobox has null value then something is wrong.... and the values are not getting set properly in the combobox

ASKER

ragi: This line gets nullreferenceException string sSelectedClient = comboBox2.SelectedValue.ToString();

This must mean that the values are not getting set properly. So where should this be done? When I created my Form I added the combox2 and on this there was an arrow i pressed and edited the vaules I wanted. Isnt that enough?

dose anything showin the combobox when you run the applicaiton?

have a look at this sample link from MSDN show how to bind data to the combobox
http://msdn.microsoft.com/en-us/library/x8ybe6s2(VS.80).aspx

ASKER

praveenvenu: selectedValue = (int)comboBox2.SelectedValue;

ASKER

Well if I dont try to get whats in the comboBox it runs just fine. I can see all my values in the drop down list and choose them. It is just when I try to get the value it crashes.

I have been into msdn and read that before and it looks like I do it right. Here is the combobox2 code

this.comboBox2.FormattingEnabled = true;
this.comboBox2.Items.AddRange(new object[] {
"ShowAllSeats",
"ShowOnlyVaccantSeats",
"ShowOnlyReserved"});
this.comboBox2.Location = new System.Drawing.Point(235, 79);
this.comboBox2.Name = "comboBox2";
this.comboBox2.Size = new System.Drawing.Size(164, 21);
this.comboBox2.TabIndex = 6;
this.comboBox2.SelectedIndexChanged += new System.EventHandler(this.comboBox2_SelectedIndexChanged);

ASKER

I am able to set this in the start up:

comboBox2.SelectedIndex = 1;

and then it shows the right value.

This is strange.

ASKER

Hmmm looks like I solved it my self. :-)

I did like this

if (comboBox2.SelectedIndex == 0)
{
... the code
}

ASKER CERTIFIED SOLUTION

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