BigQueryDataAdapter Constructor(BigQueryCommand)

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Initializes a new instance of the BigQueryDataAdapter class with the specified BigQueryCommand as the SelectCommand property.

Syntax

Visual Basic
C#


'Declaration Public Function New( _ ByVal selectCommand As BigQueryCommand _ )


public BigQueryDataAdapter( BigQueryCommand selectCommand )

Parameters

selectCommand: A BigQueryCommand that contains SQL SELECT statement, and is set as the SelectCommand property of the BigQueryDataAdapter.

Remarks

This implementation of the BigQueryDataAdapter constructor sets the SelectCommand property to the value specified in the parameter.

When you create an instance of BigQueryDataAdapter, the following read/write properties are set to their default values, as shown in the table.

Properties	Default Value
MissingMappingAction	MissingMappingAction.Passthrough
MissingSchemaAction	MissingSchemaAction.Add

You can change the value of any of these properties through a separate call to the property.

Example

The following example creates a BigQueryDataAdapter, sets some of its properties, retrieves data from a table, and displays it.

csharp


public void CreateDataAdapter(BigQueryConnection bigQueryConnection) { BigQueryCommand bigQueryCommand = new BigQueryCommand("SELECT DeptNo, DName FROM your_project.your_dataset.employees", bigQueryConnection); BigQueryDataAdapter myAdapter = new BigQueryDataAdapter(bigQueryCommand); myAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey; DataSet myDataSet = new DataSet(); myAdapter.Fill(myDataSet,"your_project.your_dataset.employees"); //Get all data from all tables within the dataset foreach(DataTable myTable in myDataSet.Tables) { foreach(DataRow myRow in myTable.Rows) { foreach (DataColumn myColumn in myTable.Columns) { Console.Write(myRow[myColumn]+"\t"); } Console.WriteLine(); } Console.WriteLine(); } }

public void CreateDataAdapter(BigQueryConnection bigQueryConnection)
{
  BigQueryCommand bigQueryCommand = new BigQueryCommand("SELECT DeptNo, DName FROM your_project.your_dataset.employees", bigQueryConnection);
  BigQueryDataAdapter myAdapter = new BigQueryDataAdapter(bigQueryCommand);
  myAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
  DataSet myDataSet = new DataSet();
  myAdapter.Fill(myDataSet,"your_project.your_dataset.employees");
  //Get all data from all tables within the dataset
  foreach(DataTable myTable in myDataSet.Tables)
  {
    foreach(DataRow myRow in myTable.Rows)
    {
      foreach (DataColumn myColumn in myTable.Columns)
      {
        Console.Write(myRow[myColumn]+"\t");
      }
      Console.WriteLine();
    }
    Console.WriteLine();
  }
}

Visual Basic


Public Sub CreateDataAdapter(ByVal bigQueryConnection As BigQueryConnection) Dim bigQueryCommand As BigQueryCommand = New BigQueryCommand("SELECT DeptNo, DName FROM your_project.your_dataset.employees", bigQueryConnection) Dim myAdapter As BigQueryDataAdapter = New BigQueryDataAdapter(bigQueryCommand) myAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey Dim myDataSet As DataSet = New DataSet myAdapter.Fill(myDataSet, "your_project.your_dataset.employees") Dim myTable As DataTable Dim myRow As DataRow Dim myColumn As DataColumn ' Get all data from all tables within the dataset For Each myTable In myDataSet.Tables For Each myRow In myTable.Rows For Each myColumn In myTable.Columns Console.Write(myRow(myColumn) & Chr(9)) Next myColumn Console.WriteLine() Next myRow Console.WriteLine() Next myTable End Sub

Public Sub CreateDataAdapter(ByVal bigQueryConnection As BigQueryConnection)
  Dim bigQueryCommand As BigQueryCommand = New BigQueryCommand("SELECT DeptNo, DName FROM your_project.your_dataset.employees", bigQueryConnection)
  Dim myAdapter As BigQueryDataAdapter = New BigQueryDataAdapter(bigQueryCommand)
  myAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey
  Dim myDataSet As DataSet = New DataSet
  myAdapter.Fill(myDataSet, "your_project.your_dataset.employees")
  Dim myTable As DataTable
  Dim myRow As DataRow
  Dim myColumn As DataColumn
  ' Get all data from all tables within the dataset
  For Each myTable In myDataSet.Tables
    For Each myRow In myTable.Rows
      For Each myColumn In myTable.Columns
        Console.Write(myRow(myColumn) & Chr(9))
      Next myColumn
      Console.WriteLine()
    Next myRow
    Console.WriteLine()
  Next myTable
End Sub

Reference

BigQueryDataAdapter Class
BigQueryDataAdapter Members
Overload List
BigQueryConnection Class
BigQueryCommand Class

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