[VB.NET]关于EXIF读取的详细问题,高手请进

发布时间：2020-12-16 23:39:47 所属栏目：大数据来源：网络整理

导读：关于EXIF读取的详细问题,高手请进我要读取一个图片的EXIF信息,信息中有汉字读不出来。请大家给点源码吧~~THANK YOU __________________________________________________________________________ 我也想要。顶 _________________________________________

关于EXIF读取的详细问题,高手请进
我要读取一个图片的EXIF信息,信息中有汉字读不出来。
请大家给点源码吧~~THANK YOU
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我也想要。顶
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自己 up 下
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这里有段 c#的代码那位高手帮我写成VB.NET

private void WriteNewDescriptionInImage(string Filename,string NewDescription)
{
Image Pic;
PropertyItem[] PropertyItems;
byte[] bDescription=new Byte[NewDescription.Length];
int i;
string FilenameTemp;
Encoder Enc=Encoder.Transformation;
EncoderParameters EncParms=new EncoderParameters(1);
EncoderParameter EncParm;
ImageCodecInfo CodecInfo=GetEncoderInfo( image/jpeg );

// copy description into byte array
for (i=0;i
// load the image to change
Pic=Image.FromFile(Filename);

// put the new description into the right property item
PropertyItems=Pic.PropertyItems;
PropertyItems[0].Id=0x010e; // 0x010e as specified in EXIF standard
PropertyItems[0].Type=2;
PropertyItems[0].Len=NewDescription.Length;
PropertyItems[0].Value=bDescription;
Pic.SetPropertyItem(PropertyItems[0]);

// we cannot store in the same image,so use a temporary image instead
FilenameTemp=Filename+ .temp ;

// for lossless rewriting must rotate the image by 90 degrees!
EncParm=new EncoderParameter(Enc,(long)EncoderValue.TransformRotate90);
EncParms.Param[0]=EncParm;

// now write the rotated image with new description
Pic.Save(FilenameTemp,CodecInfo,EncParms);

// for computers with low memory and large pictures: release memory now
Pic.Dispose();
Pic=null;
GC.Collect();

// delete the original file,will be replaced later
System.IO.File.Delete(Filename);

// now must rotate back the written picture
Pic=Image.FromFile(FilenameTemp);
EncParm=new EncoderParameter(Enc,(long)EncoderValue.TransformRotate270);
EncParms.Param[0]=EncParm;
Pic.Save(Filename,EncParms);

// release memory now
Pic.Dispose();
Pic=null;
GC.Collect();

// delete the temporary picture
System.IO.File.Delete(FilenameTemp);
}
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上面的是写入EXIF信息
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Private Sub WriteNewDescriptionInImage(ByVal Filename As String,ByVal NewDescription As String)
Dim Pic As Image
Dim PropertyItems() As PropertyItem
Dim bDescription() As Byte = New Byte(NewDescription.Length) {}
Dim i As Integer
Dim FilenameTemp As String
Dim Enc As Encoder = Encoder.Transformation
Dim EncParms As EncoderParameters = New EncoderParameters(1)
Dim EncParm As EncoderParameter
Dim CodecInfo As ImageCodecInfo = GetEncoderInfo( image/jpeg )

copy description into byte array
For i = 0 To NewDescription.Length- 1 Step i + 1
load the image to changePic=Image.FromFile(Filename)
Next

put the new description into the right property item
PropertyItems=Pic.PropertyItems
PropertyItems(0).Id=0x010e 0x010e as specified in EXIF standard
PropertyItems(0).Type=2
PropertyItems(0).Len=NewDescription.Length
PropertyItems(0).Value=bDescription
Pic.SetPropertyItem(PropertyItems(0))

we cannot store in the same image,so use a temporary image instead
FilenameTemp=Filename+ .temp

for lossless rewriting must rotate the image by 90 degrees!
EncParm=New EncoderParameter(Enc,CType(EncoderValue.TransformRotate90,Long))
EncParms.Param(0)=EncParm

now write the rotated image with new description
Pic.Save(FilenameTemp,EncParms)

for computers with low memory and large pictures: release memory now
Pic.Dispose()
Pic=Nothing
GC.Collect()

delete the original file,will be replaced later
System.IO.File.Delete(Filename)

now must rotate back the written picture
Pic=Image.FromFile(FilenameTemp)
EncParm=New EncoderParameter(Enc,CType(EncoderValue.TransformRotate270,Long))
EncParms.Param(0)=EncParm
Pic.Save(Filename,EncParms)

release memory now
Pic.Dispose()
Pic=Nothing
GC.Collect()

delete the temporary picture
System.IO.File.Delete(FilenameTemp)
End Sub
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zzy1254(逍遥)
Dim CodecInfo As ImageCodecInfo = GetEncoderInfo( image/jpeg )

这个GetEncoderInfo有波澜线

上面的代码我已经改过
功能算是可以实现英文字母可以写入但要是写入的是汉字信息就写不进去。

那位高人给点相关资料
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for (i=0;i 这句也有错 __________________________________________________________________________ zzy1254(逍遥) 写成。NET写错正确写法应该是下面这个 For i = 0 To NewDescription.Length - 1 bDescription(i) = Asc(NewDescription(i)) Next i __________________________________________________________________________ 噢，这样啊，不好意思，转换完了也没有试就给你贴上来了 __________________________________________________________________________ 这个我试拉能够添加英文的信息但汉字信息添加不了找高人呀 __________________________________________________________________________

（编辑：李大同）

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