DataTableMappingCollection.Add Method

Definition

Namespace:

System.Data.Common

Assemblies:

netstandard.dll, System.Data.Common.dll

Adds a DataTableMapping object to the collection.

Overloads

Add(Object)	Adds an Object that is a table mapping to the collection.
Add(String, String)	Adds a DataTableMapping object to the collection when given a source table name and a DataSet table name.

Add(Object)

Source:

DataTableMappingCollection.cs

Adds an Object that is a table mapping to the collection.

C#

public int Add(object? value);

Parameters

value

Object

A DataTableMapping object to add to the collection.

Returns

Int32

The index of the DataTableMapping object added to the collection.

Implements

Add(Object)

Exceptions

InvalidCastException

The object passed in was not a DataTableMapping 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.

C#

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));
    }
}

Add(String, String)

Source:

DataTableMappingCollection.cs

Adds a DataTableMapping object to the collection when given a source table name and a DataSet table name.

C#

public System.Data.Common.DataTableMapping Add(string? sourceTable, string? dataSetTable);

Parameters

sourceTable

String

The case-sensitive name of the source table to map from.

dataSetTable

String

The name, which is not case-sensitive, of the DataSet table to map to.

Returns

DataTableMapping

The DataTableMapping object that was added to the collection.

Examples

The following example creates a DataTableMappingCollection, adds DataTableMapping objects to the collection, and displays a list of the mapped source tables.

C#

public void CreateTableMappings()
{
    DataTableMappingCollection mappings =
        new DataTableMappingCollection();
    mappings.Add("Categories","DataCategories");
    mappings.Add("Orders","DataOrders");
    mappings.Add("Products","DataProducts");
    string message = "TableMappings:\n";
    for(int i=0;i < mappings.Count;i++)
    {
        message += i.ToString() + " "
            + mappings[i].ToString() + "\n";
    }
    Console.WriteLine(message);
}