Question

c# PictureBox.update以后gif为什么只显示一帧呢？？

我在C# winform中加入了一个鼠标单击事件，点击后事件PictureBox.visible=true;
后面有一个连接远程数据库的事件，但是图片加载不出来，我使用了 PictureBox.update（）方法读取图片，但是只读到了gif的一帧，请教原因及解决方法

Answer 1

PictureBox加载之后是静态的，以位图显示

Answer 2

winform的picturebox是不能显示gif的帧的....(ps:烂控件一个)

以下是让picturebox画出gif的源码

给窗体加一个 backgroundWorker

void Form1_Load(object sender, EventArgs e)
{
this.backgroundWorker1.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
this.backgroundWorker1.ProgressChanged += new ProgressChangedEventHandler(backgroundWorker1_ProgressChanged);
this.button1.Click += new EventHandler(button1_Click);
this.FormClosing += new FormClosingEventHandler(Form1_FormClosing);

//string reportPath = @"C:\1.ani";
//int cur = LoadCursorFromFile(reportPath);
//SetSystemCursor(cur, 32512);

int cur = LoadCursorFromFile(@"C:\ScreenCapture.ani");
SetSystemCursor(cur, 32512);

//Cursor.Current = new Cursor(@"C:\aa.ani");

//this.Cursor = new Cursor(@"C:\aa.ani");

fd = new FrameDimension(image.FrameDimensionsList[0]);
DrawingNum = image.GetFrameCount(fd);

}

void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
int cur = LoadCursorFromFile(@"C:WINDOWS\Cursorsarrow_m.cur");
SetSystemCursor(cur, 32512);

//backgroundWorker1.ProgressChanged -=new ProgressChangedEventHandler(backgroundWorker1_ProgressChanged);
//if (backgroundWorker1.IsBusy) backgroundWorker1.CancelAsync();

//fd = null;
//image = null;
}

FrameDimension fd;
Image image = Image.FromFile(@"C:\loading.gif");
int DrawingNum = 0;

bool dowork = false;

protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
}

void button1_Click(object sender, EventArgs e)
{
backgroundWorker1.WorkerReportsProgress = true;
backgroundWorker1.WorkerSupportsCancellation = true;

dowork = !dowork;
if (dowork) backgroundWorker1.RunWorkerAsync();
else backgroundWorker1.CancelAsync();
}

void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
this.Refresh();
image.SelectActiveFrame(fd, e.ProgressPercentage);

this.CreateGraphics().DrawImage(image, MousePosition.X - this.Location.X +8 , MousePosition.Y - this.Location.Y - 8);

}

void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
while (dowork)
{
for (int i = 0; i < DrawingNum; i++)
{
Thread.Sleep(100);
backgroundWorker1.ReportProgress(i);
}
}
}