How to Search Through a C# DropDownList Programmatically

Question

I am having a hard time figuring out how to code a series of \"if\" statements that search through different dropdownlists for a specific value entered in a textbox. I was able

Answer 1

One line of code- split for readablilty.

this.DropDownList1.SelectedItem = this.DropDownList1.Items
     .SingleOrDefault(ddli => ddli.value == this.textbox1.value);

Answer 2

while(dropdownlist1.SelectedIndex++ < dropdownlist1.Items.Count)
{
    if (dropdownlist1.SelectedValue == textBox1.text)
    {
      // Add your logic here.
    }
}

//resetting to 0th index(optional)
dropdownlist1.SelectedIndex = 0;

Answer 3

I would make a list of Drop-down boxes and then use linq to select on it.

List<DropDownList> list = new List<DropDownList>();
list.Item.Add(dropdown1);
list.Item.Add(dropdown2); 
.... (etc)

var selected = from item in list.Cast<DropDownList>()
               where item.value == textBox1.text
               select item;

Answer 4

I was trying to find item by text in dropdownlist. I used the code below, it works: )

ListItem _lstitemTemp = new ListItem("Text To Find In Dropdownlist");
if(_DropDownList.Items.Contains(_lstitemTemp))
{
    dosomething();
}

Answer 5

You can simply do like this.

if (ddl.Items.FindByValue("value") != null) {
   ddl.SelectedValue = "value";
};

Answer 6

The DropDownList inherits the Items collection from the ListControl. Since Items is an Array, you can use this syntax:

dropdownlist1.Items.Contains(textbox1.Text) as a boolean.