ListBox.FindStringExact Method (String)


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Finds the first item in the ListBox that exactly matches the specified string.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public int FindStringExact(
	string s


Type: System.String

The text to search for.

Return Value

Type: System.Int32

The zero-based index of the first item found; returns ListBox.NoMatches if no match is found.

The search performed by this method is not case-sensitive. The search looks for an exact match to the words specified in the search string parameter, s. You can use this method to search for the first item that matches the specified string. You can then perform tasks such as removing the item that contains the search text by using the Remove method or changing the item's text. Once you have found the specified text, if you want to search for other instances of the text in the ListBox, you can use the version of the FindStringExact method that provides a parameter for specifying a starting index within the ListBox. If you want to perform partial word search instead of an exact word match, use the FindString method.

The following code example demonstrates how to use the ListBox.FindStringExact method to search a ListBox control for an item that exactly matches a specified string. If no items are found that match the search string, FindStringExact returns a -1 value and the example displays a MessageBox. If an item is found that matches the search text, the example uses the SetSelected method to select the item in the ListBox.

private void FindMySpecificString(string searchString)
   // Ensure we have a proper string to search for.
   if (searchString != string.Empty)
      // Find the item in the list and store the index to the item.
      int index = listBox1.FindStringExact(searchString);
      // Determine if a valid index is returned. Select the item if it is valid.
      if (index != ListBox.NoMatches)
         MessageBox.Show("The search string did not find any items in the ListBox that exactly match the specified search string");

.NET Framework
Available since 1.1
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