如何在winform里面显示 owc画出的图片

[losgou]

如题， 小弟不胜感激

[北京的雾霾天]

//参考如下：
object bits = PieChartSpace.GetPicture();//这里最好不加参数，这样会用得到默认图
MemoryStream m = new MemoryStream(bits as byte[]);
Image img = Image.FromStream(m);
PictureBox1.Image = img;

[北京的雾霾天]

这样也可以：
byts[] bits = this.chartBasItem.GetPicture() as byte[];
if (bits != null)
{
MemoryStream m = new MemoryStream(bits);
Image img = Image.FromStream(m);
PictureBox1.Image = img;
}

[losgou]

m = New System.IO.MemoryStream((Convert.ToByte(bits)))

类型转换不过去....
玉米了

[北京的雾霾天]

楼主可以写这样的一个函数：
private Image getChartImage()
{
Image img = null;
byte[] bits = this.chartBasItem.GetPicture() as byte[];
if (bits != null)
{
MemoryStream m = new MemoryStream(bits);
img = Image.FromStream(m);
}
return img;
}
如果楼主用Convert.ToByte,可能就不合适了，因为GetPicture()返回的数据本身就已经是一个byte数组了，用这个函数是用了Convert.ToByte(object o)这个重载,这里的o不会是一个byte数组的，所以结果就转不出来了。正确的用法就是用强制转换或用as转换。楼主可按上面的函数再试试。

[北京的雾霾天]

如果再不行就改成下面的代码,因为好像这个as 用法在早期版.net不好使：
private Image getChartImage()
{
Image img = null;
object bits = this.chartBasItem.GetPicture();
if (bits is byte[])
{
MemoryStream m = new MemoryStream(bits);
img = Image.FromStream(m);
}
return img;
}

[北京的雾霾天]

sorry!
楼主用的是vb.net，等会给你一个。。。

[xlshen_lxz]

thisChart.ExportPicture(System.Windows.Forms.Application.StartupPath + "\\xxx\\xx.gif","gif",512,336);
Image image = Image.FromFile(System.Windows.Forms.Application.StartupPath + "\\xxx\\xx.gif");
this.pictureBox1.Image = image;

[北京的雾霾天]

VB.NET的写法：
Private Function getChartImage() As Image
Dim image1 As Image = Nothing
Dim buffer1 As Byte() = TryCast(Me.chartBasItem.GetPicture,Byte())
If (Not buffer1 Is Nothing) Then
Dim stream1 As New MemoryStream(buffer1)
image1 = Image.FromStream(stream1)
End If
Return image1
End Function

[losgou]

如果用 this.chartBasItem.GetPicture() 不加参数获取bits的length就是0
加了之后有值了，但后面 Image.FromStream(m) 就会出错....

[losgou]

好了，问题解决了，谢谢大侠

[losgou]

沉了，没人要分么？

[北京的雾霾天]

什么是owc?
如果是一个图片显示在winform是很简单的吧。。。
总之不明白楼主的意思

[losgou]

Dim PieChartSpace As Microsoft.Office.Interop.Owc11.ChartSpace
Dim PieChart As Microsoft.Office.Interop.Owc11.ChChart
PieChartSpace = New Microsoft.Office.Interop.Owc11.ChartSpace
PieChart = PieChartSpace.Charts.Add(0)
Dim PieChartSeries As Microsoft.Office.Interop.Owc11.ChSeries
PieChartSeries = PieChart.SeriesCollection.Add(0)
PieChartSeries.SetData(Microsoft.Office.Interop.Owc11.ChartDimensionsEnum.chDimSeriesNames, Microsoft.Office.Interop.Owc11.ChartSpecialDataSourcesEnum.chDataLiteral, "X")
PieChartSeries.SetData(Microsoft.Office.Interop.Owc11.ChartDimensionsEnum.chDimCategories, Microsoft.Office.Interop.Owc11.ChartSpecialDataSourcesEnum.chDataLiteral, "s1,s2,s3")
PieChartSeries.SetData(Microsoft.Office.Interop.Owc11.ChartDimensionsEnum.chDimValues, Microsoft.Office.Interop.Owc11.ChartSpecialDataSourcesEnum.chDataLiteral, "12,11,21")

我做到这一步都没有错
但把他弄到
PictureBox1.Image = Image.FromStream(CType(PieChartSpace.GetPicture("gif", 500, 400), System.IO.BufferedStream))

就出错了