Listview column sort

Question

I have code that allows a user to sort columns in a listview. I use it in many forms around my windows project. It works nicely on all pages and searching through the listview works nicely except for one page the searching is slowed down enormously when
the column sorting is enabled but sorting works fine. Below is the code for that page.
I allow the users to search in the search box on top (not showing but it was a textbox the user can type in and it searches in the listview) and then it reloads the listview on bottom based on the search criteria.
Also the user can click on the column header in the listview and it will sort the columns….
SEARCH
private void ProductSearch_TextChanged(object sender,
EventArgs e)
            ProductsSearch(btnAdvancedSearch.Text);
private void ProductsSearch(string filterOption)
StringBuilder sb = new
StringBuilder();
string ID = txtItemID.Text.EscapeLikeValue();
string Name1 = txtItemName1.Text.EscapeLikeValue();
string Name2 = txtItemName2.Text.EscapeLikeValue();
string Name3 = txtItemName3.Text.EscapeLikeValue();
if (ID.Length > 0)
                sb.Append("ITEMSTRING like '" + ID +
if (Name1.Length > 0)
if (sb.Length > 0)
                    sb.Append(" and ");
switch (filterOption)
case "Basic Search":
                        sb.Append("' ' + Description
like '%" + Name1 + "%'");
break;
case "Advanced Search":
                        sb.Append("Description like
'" + Name1 + "%'");
break;
if (Name2.Length > 0)
if (sb.Length > 0)
                    sb.Append(" and ");
switch (filterOption)
case "Basic Search":
                        sb.Append("' ' + Description
like '% " + Name2 + "%'");
                        break;
case "Advanced Search":
                        sb.Append("Description like
'% " + Name2 + "%'");
break;
if (Name3.Length > 0)
if (sb.Length > 0)
                    sb.Append(" and ");
switch (filterOption)
case "Basic Search":
                        sb.Append("' ' + Description
like '% " + Name3 + "%'");
break;
case "Advanced Search":
                        sb.Append("Description like
'% " + Name3 + "%'");
break;
            lsvItems.Items.Clear();
            dtProducts.DefaultView.RowFilter = sb.ToString();
foreach (DataRow row
in dtProducts.Select(sb.ToString()))
ListViewItem lvi = new
ListViewItem(row["Item"].ToString());
                lvi.SubItems.Add(row["Description"].ToString());
                lvi.SubItems.Add(row["Cost"].ToString());
                lvi.SubItems.Add(row["Price"].ToString());
                lsvItems.Items.Add(lvi);
if (dtProducts.DefaultView.Count <= 0)
Validation.ShowMessage(Main.lblStatus,
"No items match your search.");
SORTING
public Form1()
            InitializeComponent();
            lsvColumnSorter =
new ListViewColumnSorter(0);
this.lsvItems.ListViewItemSorter = lsvColumnSorter;
private ListViewColumnSorter lsvColumnSorter;
private void lsvItems_ColumnClick(object sender,
ColumnClickEventArgs e)
           ((ListView)sender).ColumnSort(e, lsvColumnSorter);
public static
void ColumnSort(this
ListView lsv, ColumnClickEventArgs e,
ListViewColumnSorter lsvColumnSorter)
// Determine if clicked column is already the column that is being sorted.
if (e.Column == lsvColumnSorter.SortColumn)
// Reverse the current sort direction for this column.
if (lsvColumnSorter.Order == System.Windows.Forms.SortOrder.Ascending)
                    lsvColumnSorter.Order = System.Windows.Forms.SortOrder.Descending;
else
                    lsvColumnSorter.Order = System.Windows.Forms.SortOrder.Ascending;
else
// Set the column number that is to be sorted; default to ascending.
                lsvColumnSorter.SortColumn = e.Column;
                lsvColumnSorter.Order = System.Windows.Forms.SortOrder.Ascending;
// Perform the sort with these new sort options.
            lsv.Sort();
In this specific page the column sorting code is effecting the searching code.
What could the problem be?
Debra has a question

Answer 1

Hi Debra,
I suggest you could use the listview to search.
you could refer to this post:
http://stackoverflow.com/questions/16549823/filtering-items-in-a-listview
Use the listView item, not to reload the listViewitem.
And then i see you using the ListViewColumnSorter class, what is this class? Is it customized?
If you could share the more details, I could help you better.
Best regards,
Youjun Tang
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