Excel C＃不能更新：数据库只读

我有2台电脑：

• Main M = Win 7,32位，Office 2007
• 虚拟V = Win 7,32位，Visual Studio 2013

我用M上的数据创build了3个Excel文件，并通过networking发送了V机器，在那里我正在构build一个程序，事情是程序工作正常，并更新V机器上的Excel工作表，BU不能在我的M机器上工作！

我努力了：

• 设置权限
• 设置“OleDb-Readonly = false;”
• 尝试在另一台机器win7的32位和64位
• 在win10 64bit的机器上试了一下
• 在该机器上创build一个新的excel文件并将数据复制到新工作表
• 在上面和下面的每一步都以pipe理员身份启动程序
• 在0和1之间查找IMEX

他们都不工作除V机器…为什么？

请注意，V机没有安装办公室，我试图抓住一台没有安装办公室的机器（或者我可以卸载它）来testing它，但不知道是否真的会导致问题。

另外请注意，我在程序中使用Access 2007连接，并且工作正常。

这里是C＃更新代码：

public static bool PreProcess(string dbpath) { //string file = System.IO.Path.Combine("./", dbpath); string connStr = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0 Xml;HDR=YES;\";", dbpath); using (var conn = new OleDbConnection(connStr)) { conn.Open(); var sql = "SELECT * FROM [Sheet1$]"; var cmd = new OleDbCommand(sql, conn); var reader = cmd.ExecuteReader(); List<string> list = new List<string>(); bool notExists; while (reader.Read()) { notExists = true; if (reader[0].ToString().Equals(""))continue; for (int cn = 0; cn < list.Count; cn++) { if (reader[0].ToString().Equals(list[cn]) || reader[0].ToString().Equals("")) { new OleDbCommand("UPDATE [Sheet1$] SET [name] = '' WHERE [name]= '" + reader[0].ToString() + "' AND [par1]="+reader[1].ToString()+"", conn).ExecuteNonQuery(); notExists = false; break; } } if (notExists) { list.Add(reader[0].ToString()); for (int i = 1; i < reader.FieldCount; i++) { try { double d = Double.Parse(reader[i].ToString()); }catch(Exception e) { //new OleDbCommand("UPDATE [Sheet1$] SET par"+i+" = '0' WHERE id = '"+reader[0].ToString()+"'"); new OleDbCommand("UPDATE [Sheet1$] SET [par"+i+"] = 0 WHERE [name]= '" + reader[0].ToString() + "'", conn).ExecuteNonQuery(); } //MessageBox.Show("Data: "+reader[i].ToString() + " - i="+i); } } } return true; } return false; } 

错误：

 Cannot update. Database or object is read only. 

细节：

 See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.Data.OleDb.OleDbException (0x80004005): Cannot update. Database or object is read-only. at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection) at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) at System.Data.ProviderBase.DbConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions) at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) at System.Data.ProviderBase.DbConnectionInternal.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.OleDb.OleDbConnection.Open() at KMean.ExcelCon.PreProcess(String dbpath) at KMean.Form1.PrePBtn_Click(Object sender, EventArgs e) at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) ************** Loaded Assemblies ************** mscorlib Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll ---------------------------------------- KMean Assembly Version: 1.0.0.0 Win32 Version: 1.0.0.0 CodeBase: file:///C:/Users/Abubakar/Desktop/KMean/KMean/bin/Release/KMean.exe ---------------------------------------- System.Windows.Forms Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll ---------------------------------------- System.Drawing Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll ---------------------------------------- System Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll ---------------------------------------- System.Data Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Data/v4.0_4.0.0.0__b77a5c561934e089/System.Data.dll ---------------------------------------- System.Core Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll ---------------------------------------- System.Xml Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll ---------------------------------------- System.Transactions Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.Transactions/v4.0_4.0.0.0__b77a5c561934e089/System.Transactions.dll ---------------------------------------- System.EnterpriseServices Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_32/System.EnterpriseServices/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.EnterpriseServices.dll ---------------------------------------- System.Configuration Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll ---------------------------------------- System.Numerics Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.17929 built by: FX45RTMREL CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Numerics/v4.0_4.0.0.0__b77a5c561934e089/System.Numerics.dll ---------------------------------------- ************** JIT Debugging ************** To enable just-in-time (JIT) debugging, the .config file for this application or computer (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled. For example: <configuration> <system.windows.forms jitDebugging="true" /> </configuration> When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box. 

编辑

我设法让V机器给我同样的问题。 我没有改变，除了连接string失败，然后返回到它的原始状态。 现在它消失了….同样的错误：“无法更新…”

Answer 1

我看了一下，打开的连接在这里工作正常。

我需要安装2016版本的ACE引擎。 我看到M机器正在运行Office 2007.引擎的差异不太可能在连接打开时产生只读问题; 但你永远不知道。 发生这些types的错误时，值得探讨机器configuration的差异。

这是我使用的代码。 这工作正常。

 using System; using System.Collections.Generic; using System.Data.OleDb; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ExcelReadOnly { class Program { static void Main(string[] args) { PreProcess("Sample File.xlsx"); Console.In.ReadLine(); } public static bool PreProcess(string dbpath) { string connStr = $"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={dbpath};Extended Properties=\"Excel 12.0 Xml;HDR=YES;\";"; using (var conn = new OleDbConnection(connStr)) { conn.Open(); var cmd = new OleDbCommand("SELECT * FROM [Sheet1$]", conn); var reader = cmd.ExecuteReader(); while (reader?.Read() == true) Console.Out.WriteLine($"Name: {reader[0]}, Par1: {reader[1]}"); reader?.Close(); new OleDbCommand("INSERT INTO [Sheet1$] ([Name], [Par1]) VALUES ('Name 0', '0')", conn) .ExecuteNonQuery(); new OleDbCommand("INSERT INTO [Sheet1$] ([Name], [Par1]) VALUES ('Name 1', '1')", conn) .ExecuteNonQuery(); new OleDbCommand("INSERT INTO [Sheet1$] ([Name], [Par1]) VALUES ('Name 2', '2')", conn) .ExecuteNonQuery(); reader = cmd.ExecuteReader(); while (reader?.Read() == true) Console.Out.WriteLine($"Name: {reader[0]}, Par1: {reader[1]}"); reader?.Close(); } return false; } } }