如何將char *轉換爲TMemorystream *類型？

Question

1.如何將char *保存到圖像文件？
2.如何將char *轉換爲TMemorystream *類型？

void process(char* data, int length) 
{ 
    //the data is a image 
} 

//I have try follow code,but display a blank photo. 
TMemoryStream * MemoryImageStream=new TMemoryStream; 
MemoryImageStream->Position=0; 
MemoryImageStream->Write(photo,len); 

Answer 1

您需要爲TMemoryImageStream對象指定適當的大小。

代替：

TMemoryStream * MemoryImageStream=new TMemoryStream; 
    MemoryImageStream->Position=0; 
    MemoryImageStream->Write(photo,len); 

它改變到：

TMemoryStream * MemoryImageStream=new TMemoryStream(len); 
    MemoryImageStream->Position=0; 
    MemoryImageStream->Write(photo,len); 

參見： http://msdn.microsoft.com/en-us/library/system.io.memorystream.aspx?cs-save-lang=1&cs-lang=cpp#code-snippet-1 [^]