Question

我正在尝试向我的数据库添加信息。我有这个代码

private OleDbConnection connect;
private OleDbCommand command;

public DataBaseManager()
{
        connect = new OleDbConnection();
        command = new OleDbCommand();
        connect.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\Aurelian\Desktop\Photo.accdb;
        Persist Security Info=False;";
        connect.Open();
        command.Connection = connect;
}

public void AddAlbum (Album newAlbum)
{
   command.CommandText = "INSERT INTO Album VALUES(@Id,@Name,@Description,@Location,@Data)";// + Int32.Parse(newAlbum.ID.ToString()) + ",'" + newAlbum.Name.ToString() + "','" + newAlbum.Description.ToString() + "','" + newAlbum.Location.ToString() + "'," + Convert.ToDateTime(newAlbum.Date.ToString()) + ")";

   command.Parameters.AddWithValue("@Id", newAlbum.ID);
   command.Parameters.AddWithValue("@Name", newAlbum.Name);
   command.Parameters.AddWithValue("@Description", newAlbum.Description);
   command.Parameters.AddWithValue("@Location", newAlbum.Location);
   command.Parameters.AddWithValue("@Data", newAlbum.Date);

   command.ExecuteNonQuery();
}

和电话：

DataBaseManager dm = new DataBaseManager();
Album alb=new Album(5,"TEST","TestDescriere","TestLocatie",new DateTime(2012,12,12));
dm.AddAlbum(alb);

问题在于这一行：

command.ExecuteNonQuery();

这是错误：

发生了'System.Data.OleDb.OleDbException'类型的异常   System.Data.dll但未在用户代码中处理

附加信息：参数@Name没有默认值。

Answer 1

请检查您实际上是在类构造函数中设置name属性。

Answer 2

听起来你的newAlbum.Name为空。

参数没有默认值，数据库c＃

2 个答案: