I'm trying to save Excel files into the database, I do not want to use filestream as it is required to have a server for that.
So how do I insert/update/select into the table that has a column of type varbinary(max)
?
Chose the Sql Server instance and chose the database to which the excel to be imported. Select Copy data from one or more tables or views and click Next . Now select the sheets to be imported to Sql Server . Now the wizard imports the data from Excel to Sql Server and click Close .
Go to the SQL Spreads tab in Excel and select Design mode. A list of databases will appear on the right. Chose the database you are using and select an SQL table to update from Excel. From the Columns tab you can fine-tune how your table is presented in Excel.
If you want to do it in straight ADO.NET, and your Excel files aren't too big so that they can fit into memory at once, you could use these two methods:
// store Excel sheet (or any file for that matter) into a SQL Server table
public void StoreExcelToDatabase(string excelFileName)
{
// if file doesn't exist --> terminate (you might want to show a message box or something)
if (!File.Exists(excelFileName))
{
return;
}
// get all the bytes of the file into memory
byte[] excelContents = File.ReadAllBytes(excelFileName);
// define SQL statement to use
string insertStmt = "INSERT INTO dbo.YourTable(FileName, BinaryContent) VALUES(@FileName, @BinaryContent)";
// set up connection and command to do INSERT
using (SqlConnection connection = new SqlConnection("your-connection-string-here"))
using (SqlCommand cmdInsert = new SqlCommand(insertStmt, connection))
{
cmdInsert.Parameters.Add("@FileName", SqlDbType.VarChar, 500).Value = excelFileName;
cmdInsert.Parameters.Add("@BinaryContent", SqlDbType.VarBinary, int.MaxValue).Value = excelContents;
// open connection, execute SQL statement, close connection again
connection.Open();
cmdInsert.ExecuteNonQuery();
connection.Close();
}
}
To retrieve the Excel sheet back and store it in a file, use this method:
public void RetrieveExcelFromDatabase(int ID, string excelFileName)
{
byte[] excelContents;
string selectStmt = "SELECT BinaryContent FROM dbo.YourTableHere WHERE ID = @ID";
using (SqlConnection connection = new SqlConnection("your-connection-string-here"))
using (SqlCommand cmdSelect = new SqlCommand(selectStmt, connection))
{
cmdSelect.Parameters.Add("@ID", SqlDbType.Int).Value = ID;
connection.Open();
excelContents = (byte[])cmdSelect.ExecuteScalar();
connection.Close();
}
File.WriteAllBytes(excelFileName, excelContents);
}
Of course, you can adapt this to your needs - you could do lots of other things, too - depending on what you really want to do (not very clear from your question).
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