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ExcelApplication's ImportData method allows you to import blocks of data to a worksheet from a database or a rectangular array. ImportData is a method of both Worksheet and Area. The method returns a Area object representing a the set of cells that contain the imported data.

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ImportData does not insert values into the worksheet and push existing values down. The imported data will overwrite existing values in the target cells.

Importing from a Database

You can import values from a database to a worksheet by passing the ImportData method a DataTable, DataView, SqlDataReader, OleDbDataReader, or AdomdDataReader.

The DataTable and DataView classes are in the System.Data namespace. Use an Import directive to import the namespace to the aspx page:

To import System.Data to a C# code-behind page (.aspx.cs), use:

To import database values using OleDb, import the System.Data.OleDb namespace to your page. To import database values using SqlClient, import the System.Data.SqlClient namespace to your page.

To import values from a database to your worksheet:

  1. Connect to the database and execute a query to return a DataTable, DataView, SqlDataReader, OleDbDataReader, or AdomdDataReader for example:

  2. Pass the ADO.NET DataTable to ImportData:

Importing from an Array

To import values from a two-dimensional array to your worksheet:

  1. Create a rectangular array, for example:

  2. Pass the array to ImportData:

Customizing Your Data Import

The DataImportProperties class contains a set of properties that are used when importing data to cells in a worksheet. The settings of a DataImportProperties object will be applied to a data import if the object is passed to ImportData (with the set of values to import). You can create several DataImportProperties objects and assign a different one to each data import, or re-use one object in multipleImportData calls.

To customize a data import using a DataImportProperties object:

  1. Create a DataImportProperties object with the Workbook.CreateDataImportProperties() method:

  2. Set one or more data import propeties:

  3. Define a DataTable, DataView, SqlDataReader, OleDbDataReader, AdomdDataReader or rectangular array, for example:

  4. Pass the data and the DataImportProperties object to ImportData:

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