SqlCeDataAdapter Constructor ()

아티클
10/22/2007

Initializes a new instance of the SqlCeDataAdapter class.

Namespace: System.Data.SqlServerCe
Assembly: System.Data.SqlServerCe (in system.data.sqlserverce.dll)

Syntax

'Declaration
Public Sub New
'Usage
Dim instance As New SqlCeDataAdapter

public SqlCeDataAdapter ()

public:
SqlCeDataAdapter ()

public SqlCeDataAdapter ()

public function SqlCeDataAdapter ()

Remarks

When you create an instance of SqlCeDataAdapter, the following read/write properties are set to the following initial values.

Properties	Initial Value
MissingMappingAction	MissingMappingAction.Passthrough
MissingSchemaAction	MissingSchemaAction.Add

You can change the value of any of these properties by making a separate call to that property.

Example

The following example creates a SqlCeDataAdapter and sets some of its properties.

Dim cmd As SqlCeCommand = Nothing
Dim adp As SqlCeDataAdapter = Nothing

Try
    adp = New SqlCeDataAdapter()
    Dim conn As New SqlCeConnection("Data Source = MyDatabase.sdf")

    ' Create the SelectCommand
    '
    cmd = conn.CreateCommand()
    cmd.CommandText = "SELECT [Employee ID], [First Name], [Last Name] FROM Employees"
    adp.SelectCommand = cmd

    ' Create the InsertCommand
    '
    cmd = conn.CreateCommand()
    cmd.CommandText = "INSERT INTO Employees ([First Name],[Last Name]) VALUES (@first, @last)"

    Dim p As SqlCeParameter = Nothing

    p = cmd.Parameters.Add("@first", SqlDbType.NVarChar, 10, "First Name")
    p.SourceVersion = DataRowVersion.Original

    p = cmd.Parameters.Add("@last", SqlDbType.NVarChar, 20, "Last Name")
    p.SourceVersion = DataRowVersion.Original

    adp.InsertCommand = cmd

    ' Create the UpdateCommand
    '
    cmd = conn.CreateCommand()
    cmd.CommandText = "UPDATE Employees SET [First Name] = @first, " + _
        "[Last Name] = @last WHERE [Employee ID] = @employeeID"

    p = cmd.Parameters.Add("@first", SqlDbType.NVarChar, 10, "First Name")
    p.SourceVersion = DataRowVersion.Current

    p = cmd.Parameters.Add("@last", SqlDbType.NVarChar, 20, "Last Name")
    p.SourceVersion = DataRowVersion.Current

    p = cmd.Parameters.Add("@employeeID", SqlDbType.NVarChar, 20, "Employee ID")
    p.SourceVersion = DataRowVersion.Original

    adp.UpdateCommand = cmd

    ' Populate the dataset with the results from the SELECT statement
    '
    Dim ds As New DataSet()
    adp.Fill(ds)

    ' Modify the dataset
    '
    MessageBox.Show("Number of rows: " & ds.Tables(0).Rows.Count)

    ' Insert some rows
    '
    ds.Tables(0).Rows.Add(New Object() {Nothing, "Nancy", "Smith")
    ds.Tables(0).Rows.Add(New Object() {Nothing, "Joe", "Clayton")

    ' Update some rows
    '
    ds.Tables(0).Rows(1)(1) = "David"
    ds.Tables(0).Rows(1)(2) = "Johnson"

    ' This will execute two INSERT and one UPDATE statements
    '
    adp.Update(ds.Tables(0))
Catch e As Exception
    MessageBox.Show(e.Message)
Finally
    If Not Nothing Is adp.SelectCommand Then
        adp.SelectCommand.Dispose()
    End If
    If Not Nothing Is adp.InsertCommand Then
        adp.InsertCommand.Dispose()
    End If
End Try

SqlCeCommand cmd = null;
SqlCeDataAdapter adp = null;

try
{
    adp = new SqlCeDataAdapter();
    SqlCeConnection conn = new SqlCeConnection("Data Source = MyDatabase.sdf");

    // Create the SelectCommand
    //
    cmd = conn.CreateCommand();
    cmd.CommandText = "SELECT [Employee ID], [First Name], [Last Name] FROM Employees";
    adp.SelectCommand = cmd;

    // Create the InsertCommand
    //
    cmd = conn.CreateCommand();
    cmd.CommandText = "INSERT INTO Employees ([First Name],[Last Name]) VALUES (@first, @last)";

    SqlCeParameter p = null;

    p = cmd.Parameters.Add("@first", SqlDbType.NVarChar, 10, "First Name");
    p.SourceVersion = DataRowVersion.Original;

    p = cmd.Parameters.Add("@last", SqlDbType.NVarChar, 20, "Last Name");
    p.SourceVersion = DataRowVersion.Original;

    adp.InsertCommand = cmd;

    // Create the UpdateCommand
    //
    cmd = conn.CreateCommand();
    cmd.CommandText = "UPDATE Employees SET [First Name] = @first, " +
        "[Last Name] = @last WHERE [Employee ID] = @employeeID";

    p = cmd.Parameters.Add("@first", SqlDbType.NVarChar, 10, "First Name");
    p.SourceVersion = DataRowVersion.Current;

    p = cmd.Parameters.Add("@last", SqlDbType.NVarChar, 20, "Last Name");
    p.SourceVersion = DataRowVersion.Current;

    p = cmd.Parameters.Add("@employeeID", SqlDbType.NVarChar, 20, "Employee ID");
    p.SourceVersion = DataRowVersion.Original;

    adp.UpdateCommand = cmd;

    // Populate the dataset with the results from the SELECT statement
    //
    DataSet ds = new DataSet();
    adp.Fill(ds);

    // Modify the dataset
    //
    MessageBox.Show("Number of rows: " + ds.Tables[0].Rows.Count);

    // Insert some rows
    //
    ds.Tables[0].Rows.Add(new object[] { null, "Nancy", "Smith" );
    ds.Tables[0].Rows.Add(new object[] { null, "Joe", "Clayton" );

    // Update some rows
    //
    ds.Tables[0].Rows[1][1] = "David";
    ds.Tables[0].Rows[1][2] = "Johnson";

    // This will execute two INSERT and one UPDATE statements 
    //
    adp.Update(ds.Tables[0]);

    

catch (Exception e)
{
    MessageBox.Show(e.Message);

finally
{
    if (null != adp.SelectCommand) adp.SelectCommand.Dispose();
    if (null != adp.InsertCommand) adp.InsertCommand.Dispose();

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see .

Platforms

Windows CE, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows XP Professional x64 Edition, Windows XP SP2

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

Version Information

.NET Compact Framework

Supported in: 2.0, 1.0

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