在Windows应用程序中使用的C＃代码我得到以下错误 [英] C# code used in windows application i got below error

问题描述

您好我正在尝试放大并缩小我的代码。 .jpeg文件它运行正常。

但当我尝试使用.pdf文件时缩小我的误差。请帮助我

hi i am trying zoom in and zoom out in my code. .jpeg files it is working fine.
but when i try same with .pdf file zoom out i m getting below error.please help me

System.NullReferenceException: Object reference not set to an instance of an object. <br />
<br />
at CMSSystem.ImageViewer.btnZoomOut_Click(Object sender, EventArgs e)<br />
at System.Windows.Forms.Control.OnClick(EventArgs e)<br />
at System.Windows.Forms.Button.OnClick(EventArgs e)<br />
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)<br />
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)<br />
at System.Windows.Forms.Control.WndProc(Message& m)<br />
at System.Windows.Forms.ButtonBase.WndProc(Message& m)<br />
at System.Windows.Forms.Button.WndProc(Message& m)<br />
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)<br />
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)<br />
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntP

推荐答案

正在使用的一个或多个类/对象d /涉及未初始化。需要查看被调用函数的参数。或写作。

one or multiple class/object(s) being used/involved is not initialised. need to look into the parameters of the function being invoked. or in which it is written.

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