如何自己上传图片更换winform背景图片

Question

我说的是由用户自己上传，写到这里没有报错，但是运行时候有问题。
 PicName = openFileDialog2.FileName;
            openFileDialog2.Filter = "*.jpg(jpg)|*.jpg|*.png(png)|*.png";
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                this.BackgroundImage = Image.FromFile(Path.GetDirectoryName(openFileDialog2.FileName)); 
            }

Answer 1

那个  if里面是openFileDialog1...

Answer 2

 if (openFileDialog2.ShowDialog() == DialogResult.OK)

Answer 3

 PicName = openFileDialog2.FileName;
            openFileDialog2.Filter = "*.jpg(jpg)|*.jpg|*.png(png)|*.png";
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                this.BackgroundImage = Image.FromFile(Path.GetDirectoryName(openFileDialog2.FileName)); 
            }楼主弄那么多openFileDialog干吗， if (openFileDialog1.ShowDialog() == DialogResult.OK)这里的openFileDialog1改为openFileDialog2吧

Answer 4

这样 你可能是copy的时候没有改完PicName = openFileDialog2.FileName;
            openFileDialog2.Filter = "*.jpg(jpg)|*.jpg|*.png(png)|*.png";
            if (openFileDialog2.ShowDialog() == DialogResult.OK)
            {
                this.BackgroundImage = Image.FromFile(Path.GetDirectoryName(openFileDialog2.FileName)); 
            }

Answer 5

还是有问题...
************* 异常文本 **************
System.IO.FileNotFoundException: C:\Users\Administrator\Downloads
   在 System.Drawing.Image.FromFile(String filename, Boolean useEmbeddedColorManagement)
   在 System.Drawing.Image.FromFile(String filename)
   在 铜镜映无邪.Form1.修改背景色ToolStripMenuItem_Click(Object sender, EventArgs e) 位置 E:\360data\重要数据\我的文档\Visual Studio 2010\Projects\铜镜映无邪\铜镜映无邪\Form1.cs:行号 162
   在 System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   在 System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
   在 System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   在 System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   在 System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
   在 System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
   在 System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   在 System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
   在 System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   在 System.Windows.Forms.Control.WndProc(Message& m)
   在 System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   在 System.Windows.Forms.ToolStrip.WndProc(Message& m)
   在 System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
   在 System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   在 System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   在 System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
************** 已加载的程序集 **************
mscorlib
    程序集版本: 4.0.0.0
    Win32 版本: 4.0.30319.235 (RTMGDR.030319-2300)
    基本代码: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll
----------------------------------------
铜镜映无邪
    程序集版本: 1.0.0.0
    Win32 版本: 1.0.0.0
    基本代码: file:///E:/360data/重要数据/我的文档/Visual%20Studio%202010/Projects/铜镜映无邪/铜镜映无邪/bin/Debug/铜镜映无邪.exe
----------------------------------------
System.Windows.Forms
    程序集版本: 4.0.0.0
    Win32 版本: 4.0.30319.235 built by: RTMGDR
    基本代码: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
    程序集版本: 4.0.0.0
    Win32 版本: 4.0.30319.1 built by: RTMRel
    基本代码: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System
    程序集版本: 4.0.0.0
    Win32 版本: 4.0.30319.236 built by: RTMGDR
    基本代码: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Configuration
    程序集版本: 4.0.0.0
    Win32 版本: 4.0.30319.1 (RTMRel.030319-0100)
    基本代码: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
    程序集版本: 4.0.0.0
    Win32 版本: 4.0.30319.1 built by: RTMRel
    基本代码: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Windows.Forms.resources
    程序集版本: 4.0.0.0
    Win32 版本: 4.0.30319.235 built by: RTMGDR
    基本代码: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms.resources/v4.0_4.0.0.0_zh-Hans_b77a5c561934e089/System.Windows.Forms.resources.dll
----------------------------------------
mscorlib.resources
    程序集版本: 4.0.0.0
    Win32 版本: 4.0.30319.235 (RTMGDR.030319-2300)
    基本代码: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/mscorlib.resources/v4.0_4.0.0.0_zh-Hans_b77a5c561934e089/mscorlib.resources.dll
----------------------------------------************** JIT 调试 **************
要启用实时(JIT)调试，
该应用程序或计算机的 .config 文件(machine.config)的 system.windows.forms 节中必须设置
jitDebugging 值。
编译应用程序时还必须启用
调试。例如: <configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>启用 JIT 调试后，任何未经处理的异常
都将被发送到在此计算机上注册的 JIT 调试器，
而不是由此对话框处理。

Answer 6

if里面改成下面就行了 if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                this.BackgroundImage = Image.FromFile(openFileDialog2.FileName); 
            }
自己看看FromFile里面参数的含义。你用个Path.GetDirectoryName获取的是什么东西。

Answer 7

openFileDialog2.FileName本来就是地址了，也包括文件名在内的地址，这样就可以了
 if (openFileDialog1.ShowDialog() == DialogResult.OK)
 {
     this.BackgroundImage = Image.FromFile(openFileDialog2.FileName); 
 }