How can I use SQLite query parameters in a WinRT app?

问题

I want to use query parameters in my update sql, and had this code:

internal static int UpdatePhotosetName(string oldPhotosetName, string newPhotosetName)
{
    String qryUpdateBaseTable = "UPDATE PhotraxBaseData SET photosetName = @newName WHERE photosetName = @oldName";
    int rowsUpdated;
    using (var db = new SQLite.SQLiteConnection(App.DBPath))
    {
        SQLiteCommand cmd = new SQLiteCommand(db);
        cmd.CommandText = qryUpdateBaseTable;
        cmd.Parameters.Add(new SQLiteParameter("@newName"));
        cmd.Parameters.Add(new SQLiteParameter("@oldName"));
        Command.Parameters["@newName"].Value = newPhotosetName;
        Command.Parameters["@oldName"].Value = oldPhotosetName;
        rowsUpdated = cmd.ExecuteNonQuery();
        db.Close();
    }
    return rowsUpdated;
}

...but all of the following were flagged as being unavailable/nonexistent in the current context:

Parameters
SQLiteParameter
Command

I do have Sqlite-Net installed (SQLite.cs and SQLiteAsync.cs), and version 3.8.7.1 of "SQLite for Windows Runtime (Windows 8.1)"

I based this code on what I found here, but apparently the WinRT way of doing this differs significantly from the more staid way.

How can I utilize query parameters in a WinRT app?

UPDATE

This is not as sexy as some fancy-pants LINQ, I reckon, but it does work:

internal static int UpdatePhotosetName(string oldPhotosetName, string newPhotosetName)
{
    String qryUpdateBaseTable = String.Format(
        @"UPDATE PhotraxBaseData SET photosetName = '{0}' WHERE photosetName = '{1}'", 
            newPhotosetName, oldPhotosetName);
    int rowsUpdated;
    using (var db = new SQLite.SQLiteConnection(App.DBPath))
    {
        SQLiteCommand cmd = new SQLiteCommand(db);
        cmd.CommandText = qryUpdateBaseTable;
        rowsUpdated = cmd.ExecuteNonQuery();
    }
    return rowsUpdated;
}

That's okay; I'm too sexy for my compiler already, anyway.

UPDATE 2

I guess one can never really be too sexy; I'm going with Thomas Levesque's ultra-trim look, after all:

    internal static int UpdatePhotosetName(string oldPhotosetName, string newPhotosetName)
    {
        String qryUpdateBaseTable = "UPDATE PhotraxBaseData SET photosetName = ? WHERE photosetName = ?";
        int rowsUpdated;
        using (var db = new SQLite.SQLiteConnection(App.DBPath))
        {
            rowsUpdated = db.Execute(qryUpdateBaseTable, newPhotosetName, oldPhotosetName); // look, ma: no superfluous code!
        }
        return rowsUpdated;
    }

回答1:

db.Execute("UPDATE PhotraxBaseData SET photosetName = ? WHERE photosetName = ?", newName, oldName);

来源：https://stackoverflow.com/questions/26685223/how-can-i-use-sqlite-query-parameters-in-a-winrt-app

标签

sqlite

windows-8

windows-runtime

query-parameters