Datatable to listbox

Question

5.00/5 (1 vote)

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Hi,

I wanna add 1 column data from datatable to listbox here is the code by which i am not able to achieve ..! here dt1 is a datatable.

C#

for (i = 0; i < dt1.Rows.Count; i++)
{
    ListBox1.Items[i].value = dt1.Rows[i][1].ToString();
}

thanks in advance.

Posted 14-Nov-10 22:39pm

shwetha_m6

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3 solutions

Solution 3

C#

List<string> lst = new List<string>();
           foreach (DataRow r in dt.Rows)
           {
               lst.Add(r["ColumnName"].ToString());
           }
           listBox1.Items.Clear();
           listBox1.DataSource = lst;

Posted 15-Nov-10 5:44am

alrosan

Comments

Henry Minute 15-Nov-10 11:53am

Why disassociate the ListBox from the Data by having the unnecessary and time consuming task of creating a List<>?

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Kanasz Robert · Accepted Answer · 2010-11-15T01:22:00

Hi,
try this:

using (SqlConnection conn = new SqlConnection(CONN_STR))
using (SqlDataAdapter da = new sqlDataAdapter("roboticSiteNames", conn)) {
DataSet ds = new DataSet();
da.Fill(ds);
DataTable dt = ds.Tables[0];

// 1. set DisplayMember and ValueMember
lbSiteCode.DisplayMember = dt.Columns[0].ColumnName;
lbSiteCode.ValueMember = dt.Columns[1].ColumnName;
// 2. set DataSource
lbSiteCode.DataSource = dt;
}

Regards
Robert

E.F. Nijboer · Accepted Answer · 2010-11-14T22:44:00

Solution 1

Instead of adding the items yourself, simply use the DataSource DisplayMember and ValueMember, like this:

C#

listBox1.DataSource = dt1;
listBox1.DisplayMember = "Name";
listBox1.ValueMember = "ID";

Name and ID need to be replaced by columns in your table.

If you would like to see more columns, have a look here:
http://www.codeproject.com/KB/combobox/multicolumnlistbox.aspx[^]

Good luck!

Posted 14-Nov-10 22:44pm

E.F. Nijboer

Updated 14-Nov-10 22:45pm

v3

Comments

David Obinger 5-Jun-17 11:11am

Thanks for the tip, but I have got another problem shortly thereafter:
Every time I select another item, the text of the previously selected item changes itself to a number, which is the ID of the currently selected item. When you select one of these numbers, it jumps to the item, which has the corresponding ID.
E.g. If I select the item "4" (which is actually #7 in the listBox index) it jumps to item #4 and changes item #4 to "7".
Got any clues what happened?

E.F. Nijboer 9-Jun-17 16:09pm

No, sorry. Maybe post a new question here on codeproject with some code to help explain the problem.