Search a list box while typing in a text box in Winforms C#

roy himanshu

HI,
I have a list-box where items are loaded from database , when user types anything in text-box, list-box should search the starting characters entered and display it in List box.?
For example :
As soon as User types "A" in text-box ,then all the records starting from "A" should be displayed in List-box.
When user selects the record and press enter,that record should be entered in Gridview.
And also when user clicks the record from mouse,that record should be entered in Gridview.
I don't want to use text-box auto complete mode

3 Replies

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roy himanshu17y ago
tanx for ur response
still now iam not getting out put.i entered a letter in text box but items are not displayed in list box.i have one doubt. how to bound the list box to data base.plz help me
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Lalit M17y ago

You can use this code sample
--------------------------------------

listBox2.ClearSelected();
searchString2 = textBox2.Text;
listBox2.SelectionMode = SelectionMode.MultiExtended;
int x = -1;

if (searchString2.Length != 0)
{
do
{
x = listBox2.FindString(searchString2, x);
if (x != -1)
{
if (listBox2.SelectedIndices.Count > 0)
{
if (x == listBox2.SelectedIndices[0])
return;
}
listBox2.SetSelected(x, true);
}
}
while (x != -1);
}


Also Try this code
---------
1. Use DataTable as a datasource for the listbox,set valuemember (eg Id) and displaymeber property (eg Name) as well.

2. Store that datatable in your program as global variable.

2. Add a keypress event handler for textbox and in keypress event
and in that handler filter global datatable using Select method 
eg. DataRow[] drArr=dtGlobal.Select("Name='" + txt.Text + "'");

 DataTable dtNew = new DataTable();
            for (int i = 0; i < drArr.Length; i++)
                dt.Rows.Add(drArr[i].ItemArray);

now set dtNew as datasource of ListBox.

listBox1.DataSource=dtNew.

Kirtan Patel17y ago
Friend,

Here i coded what you want :)

please check "do you like this answer" check box if it helps you :)

List<string> list = new List<string>();

        private void Form1_Load(object sender, EventArgs e)

        {

            list.Clear();

            foreach (String str in listBox1.Items)

            {

                list.Add(str);

            }

        }

        private void txtSearch_TextChanged(object sender, EventArgs e)

        {

            if (String.IsNullOrEmpty(txtSearch.Text.Trim()) == false)

            {

                listBox1.Items.Clear();

                foreach (string str in list)

                {

                    if (str.StartsWith(txtSearch.Text.Trim()))

                    {

                        listBox1.Items.Add(str);

                    }

                }

            }

            else if(txtSearch.Text.Trim() == "")

            {

                listBox1.Items.Clear();

                foreach (string str in list)

                {

                    listBox1.Items.Add(str);

                }

            }

        }

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