如何在SQL Server 2008中将Excel文件插入/检索到varbinary（max）列？

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.

我正在尝试将Excel文件保存到数据库中，我不想使用文件流，因为它需要有一个服务器。

So how do I insert/update/select into the table that has a column of type varbinary(max)?

那么如何在具有varbinary（max）类型的列的表中插入/更新/选择？

2 个解决方案

#1

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:

如果你想直接在ADO.NET中做，并且你的Excel文件不是太大，以便它们可以一次装入内存，你可以使用这两种方法：

// 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:

要重新检索Excel工作表并将其存储在文件中，请使用以下方法：

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).

当然，你可以根据你的需要调整它 - 你可以做很多其他的事情 - 取决于你真正想做的事情（你的问题不是很清楚）。

#2

It depends on the data access technology you are using. For example, if you use Entity Framework, you can just save a byte array into the database using objects.

这取决于您使用的数据访问技术。例如，如果使用Entity Framework，则只需使用对象将字节数组保存到数据库中。

#1