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我在這裏遇到的問題是，我正在構建一個組合的COM和Excel自動化添加。當試圖訪問我創建的Automation Add In類中的Properties.Settings.Default時，即使COM Add In返回的值已經通過配置表單保存，但通過的值也是我爲項目設置的默認值。Visual Studio C＃Properties.Settings.Default問題
所有類都在同一個項目中，並且在同一個命名空間下，並且我的Configuration窗體，COM加載項和功能區的類文件都能夠訪問更新的Properties.Settings.Default值。我的自動化加載項和一個靜態類（處理所有繁重的工作）不能訪問更新的值。
COM加載項：
絲帶：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using Microsoft.Office.Tools.Ribbon;
using Excel = Microsoft.Office.Interop.Excel;
using Microsoft.Office.Tools.Excel;
namespace DBLink
{
public partial class Ribbon1
{
private void Ribbon1_Load(object sender, RibbonUIEventArgs e)
{
//Even setting the connection string from a class that has
//access to the correct values fails and says the connection
//string is not initialised.
string conString;
conString = "User ID = " + Properties.Settings.Default.DBUser + "; Password = " + Properties.Settings.Default.DBPassword + "; Data Source = " + Properties.Settings.Default.DBServer + "; Initial Catalog = " + Properties.Settings.Default.DBName + "; ";
DataLink.connString = conString;
MessageBox.Show("User ID = " + Properties.Settings.Default.DBUser + "; Password = " + Properties.Settings.Default.DBPassword + "; Data Source = " + Properties.Settings.Default.DBServer + "; Initial Catalog = " + Properties.Settings.Default.DBName + "; ");
}
private void button1_Click(object sender, RibbonControlEventArgs e)
{
Form frm = new Form1();
frm.ShowDialog();
}
private void button2_Click(object sender, RibbonControlEventArgs e)
{
try
{
DataLink.LoadData(Globals.ThisAddIn.Application.ActiveWorkbook);
}
catch(Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
}
private void button5_Click(object sender, RibbonControlEventArgs e)
{
//Do Stuff
}
private void button3_Click(object sender, RibbonControlEventArgs e)
{
//Do Stuff
}
}
}
表：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Windows.Forms;
namespace DBLink
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button2_Click(object sender, EventArgs e)
{
Properties.Settings.Default.DBServer = textBox1.Text;
Properties.Settings.Default.DBName = textBox2.Text;
Properties.Settings.Default.DBUser = textBox3.Text;
Properties.Settings.Default.DBPassword = textBox4.Text;
Properties.Settings.Default.Save();
}
private void button1_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("User ID = " + Properties.Settings.Default.DBUser + "; Password = " + Properties.Settings.Default.DBPassword + "; Data Source = " + Properties.Settings.Default.DBServer + "; Initial Catalog = " + Properties.Settings.Default.DBName + "; ");
try
{
con.Open();
MessageBox.Show("Connected successfully");
con.Close();
}
catch
{
MessageBox.Show("There was a problem connecting to the database. Please confirm the details!");
}
}
}
}
自動化：
using System;
using System.Runtime.InteropServices;
using Microsoft.Win32;
namespace DBLink
{
[Guid("19C7ACDB-1572-4988-984F-3C56AEF117A5")]
[ClassInterface(ClassInterfaceType.AutoDual)]
[ComVisible(true)]
public partial class MyFunctions2
{
string connectionString;
public MyFunctions2()
{
}
private static string GetSubKeyName(Type type, string subKeyName)
{
System.Text.StringBuilder s = new System.Text.StringBuilder();
s.Append(@"CLSID\{");
s.Append(type.GUID.ToString().ToUpper());
s.Append(@"}\");
s.Append(subKeyName);
return s.ToString();
}
public string MTD(int year, int period, string costCentre, string account)
{
connectionString = "User ID = " + Properties.Settings.Default.DBUser + "; Password = " + Properties.Settings.Default.DBPassword + "; Data Source = " + Properties.Settings.Default.DBServer + "; Initial Catalog = " + Properties.Settings.Default.DBName + "; ";
return DataLink.MTD(year, period, costCentre, account, connectionString).ToString();
}
public double MultiplyNTimes2(double number1, double number2, double timesToMultiply)
{
return DataLink.MultiplyNTimes(number1, number2, timesToMultiply);
}
[ComRegisterFunctionAttribute]
public static void RegisterFunction(Type type)
{
Registry.ClassesRoot.CreateSubKey(GetSubKeyName(type, "Programmable"));
RegistryKey key = Registry.ClassesRoot.OpenSubKey(GetSubKeyName(type, "InprocServer32"), true);
key.SetValue("", System.Environment.SystemDirectory + @"\mscoree.dll", RegistryValueKind.String);
}
[ComUnregisterFunctionAttribute]
public static void UnregisterFunction(Type type)
{
Registry.ClassesRoot.DeleteSubKey(GetSubKeyName(type, "Programmable"), false);
}
}
}
最後，靜態類：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using Microsoft.Office.Tools.Ribbon;
using Excel = Microsoft.Office.Interop.Excel;
namespace DBLink
{
public static partial class DataLink
{
private static string commandText = "select case when ACClass in (2,3,4,5) then SUM(ISNULL(POCredit,0)-ISNULL(PODebit,0)) else SUM(ISNULL(PODebit,0)-ISNULL(POCredit,0)) end as value from Account join Post on ACID = POAccountID left join Segment on SID = POSegmentID join Journal on POJournalID = JID where DatePart(month,JDate) = @month and DatePart(year,JDate) = @year and ACCode = @account and (SName = @seg or @seg = '*') group by ACClass";
public static string connString="";
private static SqlConnection con;
public static void SetConnString(string connection)
{
connString = connection;
}
public static void LoadData(Excel.Workbook wb)
{
//Do stuff... may be deprecated before release.
}
public static double MTD(int year, int period, string costCentre, string account, string conString)
{
DataTable dt = new DataTable();
DataSet ds = new DataSet();
double result = 0;
int month = period > 6 ? period - 6 : period + 6;
int actualYear = month > 6 ? year - 1 : year;
MessageBox.Show("User ID = " + Properties.Settings.Default.DBUser + "; Password = " + Properties.Settings.Default.DBPassword + "; Data Source = " + Properties.Settings.Default.DBServer + "; Initial Catalog = " + Properties.Settings.Default.DBName + "; ");
con = new SqlConnection(connString);
try
{
using (SqlCommand cmd = new SqlCommand(commandText, con))
{
cmd.Parameters.AddWithValue("@month", month);
cmd.Parameters.AddWithValue("@year", actualYear);
cmd.Parameters.AddWithValue("@account", account);
cmd.Parameters.AddWithValue("@seg", costCentre);
MessageBox.Show(cmd.CommandText);
MessageBox.Show(cmd.Connection.ConnectionString);
cmd.Connection.Open();
dt.Load(cmd.ExecuteReader());
if (dt.Rows.Count > 0)
{
MessageBox.Show("We have a row");
ds.Tables.Add(dt);
result = double.Parse(ds.Tables[0].Rows[0].ItemArray[0].ToString());
}
cmd.Connection.Close();
MessageBox.Show(result.ToString());
}
}
catch(Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
return result;
}
}
}
所有我能想到的是，正在創建的設置莫名其妙2個或更多的實例。如果任何人對如何解決這個問題有任何想法，那就太好了。
編輯：玩了一會兒，看起來COM加載項只在加載時看到保存的值，然後看到原來的。功能區可以一直看到設置。
編輯2：工作過它，並把以供將來參考，會回答一次通過2天的限制是放大標記答案。
**用戶**範圍內的設置？並且是程序集旁邊的配置文件？ –
@LeiYang是的，設置在用戶範圍內（在另一個項目中很久以前就遇到過這個問題）。 DBLink.dll.config.deploy文件與Visual Studio在使用發佈選項時生成的版本控制的應用程序文件文件夾中的DBLink.dll.deploy文件並排放置。如果我使用Build，則會得到與DBLink.dll並列的DBLink.dll.config文件。 – Aaron