IFieldDatabaseProvider

IFieldDatabaseProvider interface

Implement this interface to provide data for the FieldDatabase field when it’s updated.

public interface IFieldDatabaseProvider

Methods

Name	Description
GetQueryResult(string, string, string, FieldDatabase)	Returns query result.

Examples

Shows how to extract data from a database and insert it as a field into a document.

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

// This DATABASE field will run a query on a database, and display the result in a table.
FieldDatabase field = (FieldDatabase)builder.InsertField(FieldType.FieldDatabase, true);
field.FileName = DatabaseDir + "Northwind.accdb";
field.Connection = "Provider=Microsoft.ACE.OLEDB.12.0";
field.Query = "SELECT * FROM [Products]";

Assert.AreEqual($" DATABASE  \\d {DatabaseDir.Replace("\\", "\\\\") + "Northwind.accdb"} \\c Provider=Microsoft.ACE.OLEDB.12.0 \\s \"SELECT * FROM [Products]\"", field.GetFieldCode());

// Insert another DATABASE field with a more complex query that sorts all products in descending order by gross sales.
field = (FieldDatabase)builder.InsertField(FieldType.FieldDatabase, true);
field.FileName = DatabaseDir + "Northwind.accdb";
field.Connection = "Provider=Microsoft.ACE.OLEDB.12.0";
field.Query =
    "SELECT [Products].ProductName, FORMAT(SUM([Order Details].UnitPrice * (1 - [Order Details].Discount) * [Order Details].Quantity), 'Currency') AS GrossSales " +
    "FROM([Products] " +
    "LEFT JOIN[Order Details] ON[Products].[ProductID] = [Order Details].[ProductID]) " +
    "GROUP BY[Products].ProductName " +
    "ORDER BY SUM([Order Details].UnitPrice* (1 - [Order Details].Discount) * [Order Details].Quantity) DESC";

// These properties have the same function as LIMIT and TOP clauses.
// Configure them to display only rows 1 to 10 of the query result in the field's table.
field.FirstRecord = "1";
field.LastRecord = "10";

// This property is the index of the format we want to use for our table. The list of table formats is in the "Table AutoFormat..." menu
// that shows up when we create a DATABASE field in Microsoft Word. Index #10 corresponds to the "Colorful 3" format.
field.TableFormat = "10";

// The FormatAttribute property is a string representation of an integer which stores multiple flags.
// We can patrially apply the format which the TableFormat property points to by setting different flags in this property.
// The number we use is the sum of a combination of values corresponding to different aspects of the table style.
// 63 represents 1 (borders) + 2 (shading) + 4 (font) + 8 (color) + 16 (autofit) + 32 (heading rows).
field.FormatAttributes = "63";
field.InsertHeadings = true;
field.InsertOnceOnMailMerge = true;

doc.FieldOptions.FieldDatabaseProvider = new OleDbFieldDatabaseProvider();
doc.UpdateFields();

doc.Save(ArtifactsDir + "Field.DATABASE.docx");

See Also

• namespace Aspose.Words.Fields
• assembly Aspose.Words