Question

how to compare numbers with listbox?

Answer 1

in c#

Answer 2

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
this.textBox1.Text = this.listBox1.SelectedValue.ToString();

if (listBox1.SelectedItem.Equals("Gearbox"))
{
string con = @"Server=(local);user id=sa;password=;database=TurnShop";
string qry = @"select * from Manufacturer where Product_type ='Gearbox'";
SqlDataAdapter cmd = new SqlDataAdapter(qry, con);
DataSet ds = new DataSet();
cmd.Fill(ds, "Manufacturer");
this.dataGridView1.DataSource = ds;
}
else if (listBox1.SelectedItem.Equals("Brakes"))
{
string con = @"Server=(local);user id=sa;password=;database=TurnShop";
string qry = @"select * from Manufacturer where Product_type ='Brakes'";
SqlDataAdapter cmd = new SqlDataAdapter(qry, con);
DataSet ds = new DataSet();
cmd.Fill(ds, "Manufacturer");
this.dataGridView1.DataSource = ds;
}
}

This might solve it might

Answer 3

mm i already have two list boxes, and i want to know which ones of thoses are different to the other and then print the result

Answer 4

try this


Private Sub CommonFactors(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Common.Click
Dim BoolAdd As Boolean, i As Double, j As Double
BoolAdd = False
' lstFact1 & lstFact2 are the factor listboxes
' lstCommon is where the common factors are supposed to go
If lstFact1.Items.Count = 0 Then
Exit Sub
ElseIf lstFact2.Items.Count = 0 Then
Exit Sub
Else
For i = lstFact1.Items.Count - 1 To 0 Step -1
For j = 0 To lstFact2.Items.Count
If lstFact1.Items(i) = lstFact2.Items(j) Then
BoolAdd = True
Exit For
Else
BoolAdd = False
End If
Next j
If BoolAdd = True Then
lstCommon.Items.Add(lstFact1.Items(i))
lstFact1.Items.Remove(i)
lstFact2.Items.Remove(j)
End If
Next i
End If
End Sub

Answer 5

but in the code that you just sent me, what are the controls i have to add to enter the numbers i want to compare ??