DataTableMappingCollection.IndexOf Method

Definition

Namespace:

System.Data.Common

Assembly:

System.Data.Common.dll

Gets the location of the specified DataTableMapping object within the collection.

Overloads

IndexOf(Object)	Gets the location of the specified DataTableMapping object within the collection.
IndexOf(String)	Gets the location of the DataTableMapping object with the specified source table name.

IndexOf(Object)

Source:

DataTableMappingCollection.cs

Gets the location of the specified DataTableMapping object within the collection.

public:
 virtual int IndexOf(System::Object ^ value);

public int IndexOf (object? value);

abstract member IndexOf : obj -> int
override this.IndexOf : obj -> int

Public Function IndexOf (value As Object) As Integer

Parameters

value

Object

An Object that is the DataTableMapping object to find.

Returns

Int32

The zero-based location of the specified DataTableMapping object within the collection.

Implements

IndexOf(Object)

Examples

The following example searches for a DataTableMapping within the collection. If the mapping exists in the collection, it is removed. If the mapping does not exist within the collection, it is added to the collection and its index is displayed. The example assumes that a DataTableMappingCollection collection and a DataTableMapping object have been created.

public void ChangedMyMind()
{
    // ...
    // create mappings and mapping
    // ...
    if (mappings.Contains((Object) mapping))
    {
        mappings.Remove((Object) mapping);
    }
    else
    {
        mappings.Add((Object) mapping);
        Console.WriteLine("Index of new mapping: "
            + mappings.IndexOf((Object) mapping));
    }
}

Public Sub ChangedMyMind()
    ' ...
    ' create mappings and mapping
    ' ...
    If mappings.Contains(CType(mapping, Object)) Then
        mappings.Remove(CType(mapping, Object))
    Else
        mappings.Add(CType(mapping, Object))
        Console.WriteLine("Index of new mapping: " _
           & mappings.IndexOf(CType(mapping, Object)).ToString())
    End If
End Sub

IndexOf(String)

Source:

DataTableMappingCollection.cs

Gets the location of the DataTableMapping object with the specified source table name.

public:
 virtual int IndexOf(System::String ^ sourceTable);

public int IndexOf (string? sourceTable);

abstract member IndexOf : string -> int
override this.IndexOf : string -> int

Public Function IndexOf (sourceTable As String) As Integer

Parameters

sourceTable

String

The case-sensitive name of the source table.

Returns

Int32

The zero-based location of the DataTableMapping object with the specified source table name.

Implements

IndexOf(String)

Examples

The following example searches for a DataTableMapping object with the given source table name within a DataTableMappingCollection collection. If the DataTableMapping exists, the example displays the name and the index of the mapping. If the mapping does not exist, the example displays an error. This example assumes that a DataTableMappingCollection collection has been created.

public void FindDataTableMapping()
{
    // ...
    // create mappings
    // ...
    if (!mappings.Contains("Categories"))
        Console.WriteLine("Error: no such table in collection");
    else
        Console.WriteLine
            ("Name: " + mappings["Categories"].ToString() + "\n"
            + "Index: " + mappings.IndexOf("Categories").ToString());
}

Public Sub FindDataTableMapping()
    ' ...
    ' create mappings
    ' ...
    If Not mappings.Contains("Categories") Then
        Console.WriteLine("Error: no such table in collection")
    Else
        Console.WriteLine("Name: " & mappings("Categories").ToString() _
           & ControlChars.Cr + "Index: " _
           & mappings.IndexOf("Categories").ToString())
    End If
End Sub