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BindingSource.Find Method (String, Object)

Returns the index of the item in the list with the specified property name and value.

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

public int Find(
	string propertyName,
	Object key


Type: System.String
The name of the property to search for.
Type: System.Object
The value of the item with the specified propertyName to find.

Return Value

Type: System.Int32
The zero-based index of the item with the specified property name and value.


The underlying list is not a IBindingList with searching functionality implemented.


propertyName does not match a property in the list.

The Find method can only be used when the underlying list is an IBindingList with searching implemented. This method simply refers the request to the underlying list's IBindingList.Find method. For example, if the underlying data source is a DataSet, DataTable, or DataView, this method converts propertyName to a PropertyDescriptor and calls the IBindingList.Find method. The behavior of Find, such as the value returned if no matching item is found, depends on the implementation of the method in the underlying list.

The property name comparison is case-insensitive.

The following example shows how to use the Find method with a DataView. To run this example, paste the code into a Windows Form and call PopulateDataViewAndFind from the form's constructor or Load event-handling method. Your form should import the System.Xml and System.IO namespaces.

private void PopulateDataViewAndFind()
    DataSet set1 = new DataSet();

    // Some xml data to populate the DataSet with.
    string musicXml =
        "<?xml version='1.0' encoding='UTF-8'?>" +
        "<music>" +
        "<recording><artist>Coldplay</artist><cd>X&amp;Y</cd></recording>" +
        "<recording><artist>Dave Matthews</artist><cd>Under the Table and Dreaming</cd></recording>" +
        "<recording><artist>Natalie Merchant</artist><cd>Tigerlily</cd></recording>" +
        "<recording><artist>U2</artist><cd>How to Dismantle an Atomic Bomb</cd></recording>" +

    // Read the xml.
    StringReader reader = new StringReader(musicXml);

    // Get a DataView of the table contained in the dataset.
    DataTableCollection tables = set1.Tables;
    DataView view1 = new DataView(tables[0]);

    // Create a DataGridView control and add it to the form.
    DataGridView datagridview1 = new DataGridView();
    datagridview1.AutoGenerateColumns = true;

    // Create a BindingSource and set its DataSource property to
    // the DataView.
    BindingSource source1 = new BindingSource();
    source1.DataSource = view1;

    // Set the data source for the DataGridView.
    datagridview1.DataSource = source1;

    // Set the Position property to the results of the Find method.
    int itemFound = source1.Find("artist", "Natalie Merchant");
    source1.Position = itemFound;

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.