BaseListBoxControl.FindString(String, Int32) Method

Finds the first item in the list box control which starts with the specified string. The search starts at a starting index specified by the parameter.

Namespace: DevExpress.XtraEditors

Assembly: DevExpress.XtraEditors.v19.2.dll

Declaration

C#

public int FindString(
    string s,
    int startIndex
)

VB.NET

Public Function FindString(
    s As String,
    startIndex As Integer
) As Integer

Parameters

Name	Type	Description
s	String	A string value providing the search text.
startIndex	Int32	An integer value providing the zero-based index of the start item.

Returns

Type	Description
Int32	An integer value representing the zero-based index of the first item found. -1 if no item is found.

Remarks

This method searches for the first item found that starts with the specified string. The startIndex parameter specifies the index from which the search starts. Set it to -1 to start with the first entry. Note that the search is not case-sensitive.

Usually, your first search will not provide a startIndex, but use this method syntax to find further instances of the search text.

If you want to search for an exact text instead of a partial match, use the BaseListBoxControl.FindStringExact method.

Example

The following sample code declares a DeleteItems method. This method provides search of items whose display text starts with the string specified by the s parameter (“Chicago”) within the ListBoxControl item’s collection. If found, the method removes them from the items collection.

Note: this method works if no data source is bound to the list box control. Otherwise, method execution will not take place.

The image below demonstrates the ListBoxControl control’s look & feel before and after sample code execution.

C#

using DevExpress.XtraEditors;
// ...
private void DeleteItems(ListBoxControl listBox, string s) {
    int index = listBox.FindString(s);
    if (index == -1) return;
    while (index != -1) {
        listBox.Items.RemoveAt(index);
        index = listBox.FindString(s, index);
    }
}
// ...
DeleteItems(listBoxControl1, "Chicago");

VB.NET

Imports DevExpress.XtraEditors
' ...
Private Sub DeleteItems(ByVal listbox As ListBoxControl, ByVal s As String)
    Dim index As Integer = listbox.FindString(s)
    If (index = -1) Then Return
    Do While index >= 0
        listbox.Items.RemoveAt(index)
        index = listbox.FindString(s, index)
    Loop
End Sub
' ...
DeleteItems(ListBoxControl1, "Chicago")