我目前在 ASP.NET/C# 中使用 SqlDataSource 让用户在表/网格视图中插入、删除和更新条目。每个事件都需要写入审计表。
我已经轻松实现了插入和删除 - 插入时,审核的主要信息只是插入查询的参数值(e.Command.Parameters[0].Value.ToString() 等),删除几乎相同(只是在删除查询中获取 ID)。
但是随着更新,我需要记录哪些字段已更改以及它们的旧值。我该怎么做?例如,这是插入的代码:
protected void SqlDataSource1_Inserting(object sender, SqlDataSourceCommandEventArgs e)
{
string fields = e.Command.Parameters[0].Value.ToString() + "," + e.Command.Parameters[1].Value.ToString() + "," + e.Command.Parameters[2].Value.ToString() + "," + e.Command.Parameters[3].Value.ToString() + "," + e.Command.Parameters[4].Value.ToString();
System.Security.Principal.WindowsPrincipal p = System.Threading.Thread.CurrentPrincipal as System.Security.Principal.WindowsPrincipal;
string[] namearray = p.Identity.Name.Split('\\');
string name = namearray[1];
string queryString = "INSERT INTO Audit (source, action, item, userid, timestamp) VALUES (@source, @action, @item, @userid, @timestamp)";
using (SqlConnection connection = new SqlConnection("constring - deleted for privacy "))
{
SqlCommand command = new SqlCommand(queryString, connection);
command.Parameters.AddWithValue("@source", "Nominal");
command.Parameters.AddWithValue("@action", "Insert");
command.Parameters.AddWithValue("@item", fields);
command.Parameters.AddWithValue("@userid", name);
command.Parameters.AddWithValue("@timestamp", DateTime.Now);
connection.Open();
try
{
command.ExecuteNonQuery();
}
catch (Exception x)
{
Response.Write(x);
}
finally
{
connection.Close();
}
}
}
如何才能做到这一点?