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我使用following code来备份MYSQL数据库。使用MySqlBackup.NET导出数据库时出现异常
private void button2_Click(object sender, EventArgs e)
{
string file = "D:\\backup.sql";
//string conn = "server=localhost;user=root;pwd=qwerty;database=test;";
String str = @"server=192.168.1.219;database=abc;userid=sha;password='123';";
MySqlBackup mb = new MySqlBackup(str);
mb.ExportInfo.FileName = file;
mb.Export();
}
我的堆栈跟踪如下 -
A first chance exception of type 'System.NullReferenceException' occurred in MySqlBackup.dll
System.Transactions Critical: 0 : <TraceRecord xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord" Severity="Critical"><TraceIdentifier>http://msdn.microsoft.com/TraceCodes/System/ActivityTracing/2004/07/Reliability/Exception/Unhandled</TraceIdentifier><Description>Unhandled exception</Description><AppDomain>TestAppMysqlDBConnect.vshost.exe</AppDomain><Exception><ExceptionType>System.NullReferenceException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType><Message>Object reference not set to an instance of an object.</Message><StackTrace> at MySql.Data.MySqlClient.MySqlBackup.ExportExecute()
at MySql.Data.MySqlClient.MySqlBackup.Export()
at TestAppMysqlDBConnect.Form1.button2_Click(Object sender, EventArgs e) in C:\Users\Shashika\Documents\Visual Studio 2010\Projects\TestAppMysqlDBConnect\TestAppMysqlDBConnect\Form1.cs:line 52
at System.Windows.Forms.Control.OnClick(EventArgs e)
..
但是有一个例外,并说,有一个空引用异常。当我通过C#程序将数据传递给数据库时。它被成功插入没有例外。这个异常只发生在当我尝试通过C#程序备份数据库时。我使用了上面链接的2个Dll文件。这些是 - MySql.Data.dll MySqlBackup.dll
我无法解决此异常。请帮忙。
请包括*文本副本的堆栈跟踪* 。它显示在右下角的框架中。 – 2013-02-18 05:53:11
@pst - 我想我现在收录它 – Shashika 2013-02-18 06:14:40
@pst - 很抱歉。我认为这是你想要的。不是吗? – Shashika 2013-02-18 07:00:56