Legen Sie eine benutzerdefinierte Datenquelle für WorkbookDesigner fest

Aspose.Cells bietet die Option zum Festlegen einer benutzerdefinierten Datenquelle für WorkbookDesigner. Die API stellt eine überladene Methode bereitWorkbookDesigner.SetDataSourcedie den Namen der Quelle als ersten Parameter und die Instanz der Klasse, die implementiert, verwendetICellsDataTableals zweiter Parameter.

Das folgende Code-Snippet demonstriert die Verwendung vonWorkbookDesigner.SetDataSource-Methode zum Festlegen der benutzerdefinierten DataSource.

Beispielcode

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
//Source directory
string sourceDir = RunExamples.Get_SourceDirectory();
string outputDir = RunExamples.Get_OutputDirectory();

CustomerList customers = new CustomerList();
customers.Add(new Customer("Thomas Hardy", "120 Hanover Sq., London"));
customers.Add(new Customer("Paolo Accorti", "Via Monte Bianco 34, Torino"));

Workbook workbook = new Workbook(sourceDir + "SmartMarker1.xlsx");

WorkbookDesigner designer = new WorkbookDesigner(workbook);

designer.SetDataSource("Customer", new CustomerDataSource(customers));

designer.Process();

workbook.Save(outputDir + "dest.xlsx");

Die Implementierung vonKundendatenquelle, Kunde, undKundenliste Klassen ist unten angegeben

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
public class CustomerDataSource : ICellsDataTable
{
    public CustomerDataSource(CustomerList customers)
    {
        this.m_DataSource = customers;
        this.m_Properties = customers[0].GetType().GetProperties();
        this.m_Columns = new string[this.m_Properties.Length];
        this.m_PropHash = new Hashtable(this.m_Properties.Length);

        for (int i = 0; i < m_Properties.Length; i++)
        {
            this.m_Columns[i] = m_Properties[i].Name;
            this.m_PropHash.Add(m_Properties[i].Name, m_Properties[i]);
        }
        this.m_IEnumerator = this.m_DataSource.GetEnumerator();
    }

    internal string[] m_Columns;
    internal ICollection m_DataSource;
    private Hashtable m_PropHash;
    private IEnumerator m_IEnumerator;
    private System.Reflection.PropertyInfo[] m_Properties;

    public string[] Columns
    {
        get
        {
            return this.m_Columns;
        }
    }

    public int Count
    {
        get
        {
            return this.m_DataSource.Count;
        }
    }

    public void BeforeFirst()
    {
        this.m_IEnumerator = this.m_DataSource.GetEnumerator();
    }

    public object this[int index]
    {
        get
        {
            return this.m_Properties[index].GetValue(this.m_IEnumerator.Current, null);
        }
    }

    public object this[string columnName]
    {
        get
        {
            return ((System.Reflection.PropertyInfo)this.m_PropHash[columnName]).GetValue(this.m_IEnumerator.Current, null);
        }
    }

    public bool Next()
    {
        if (this.m_IEnumerator == null)
            return false;

        return this.m_IEnumerator.MoveNext();
    }
}

public class Customer
{
    public Customer(string aFullName, string anAddress)
    {
        FullName = aFullName;
        Address = anAddress;
    }

    public string FullName { get; set; }

    public string Address { get; set; }
}

public class CustomerList : ArrayList
{
    public new Customer this[int index]
    {
        get { return (Customer)base[index]; }
        set { base[index] = value; }
    }
}

Die Quell- und Ausgabe-Excel-Dateien sind als Referenz beigefügt.

Quelldatei

Ausgabedatei