C#FileStream.read偏移量和长度超出数组的界限，或者计数大于从索引到源集合结尾处的元素数量

[weixin_41221178]

C#代码如下：
public void sendFile()
{
path = "C:/Users/PC/Desktop/SwiftMirror.exe";
FileStream fs = new FileStream(path, FileMode.Open);
long totalSize = fs.Length; //获取文件大小
int singleSize = 1024; //单次文件大小
int sendNumber = (int)totalSize / singleSize;//发送次数

byte[] bytes = new byte[singleSize];
for (int i = 0; i < sendNumber; i++)
{
fs.Read(bytes, i * singleSize, (i+1)*singleSize);
// client.Send(bytes);
}
if (totalSize - singleSize * sendNumber != 0)
{
byte[] overBytes = new byte[totalSize - singleSize * sendNumber];
fs.Read(bytes, singleSize * sendNumber, overBytes.Length);
// client.Send(bytes);
}
//将文件读到byte数组中
fs.Close();
}
异常：

[github_36000833]

public void sendFile() { path = "C:/Users/PC/Desktop/SwiftMirror.exe"; using (FileStream fs = new FileStream(path, FileMode.Open)) { fs.CopyTo(new NetworkStream(client)); } }

[杀马特丶蛮牛]

试下这样

            var path = @"C:\Users\woshi\Desktop\5.mht";
            FileStream fs = new FileStream(path, FileMode.Open);
            long totalSize = fs.Length;                             //获取文件大小
            int singleSize = 1024;                                     //单次文件大小
            int sendNumber = (int)totalSize / singleSize;//发送次数

            byte[] bytes = new byte[singleSize];
            int num = 0;
            for (int i = 0; i < sendNumber; i++)
            {
                num = i * singleSize + num;
                fs.Position = num;
                num = fs.Read(bytes, 0, singleSize);
                //    client.Send(bytes);
            }
            if (totalSize - singleSize * sendNumber != 0)
            {
                fs.Position = num;
                byte[] overBytes = new byte[totalSize - singleSize * sendNumber];
                fs.Read(bytes, 0, overBytes.Length);
                //     client.Send(bytes);
            }
            //将文件读到byte数组中
            fs.Close();

[jimmy212]

不需要这样的，filestream的read函数本身会自动移动position的，直接写

            byte[] bytes = new byte[singleSize];
            int num = 0;
            for (int i = 0; i < sendNumber; i++)
            {

                num = fs.Read(bytes, 0, singleSize);
                //    client.Send(bytes);
                // 如果需要，这里可以判断num < singleSize说明没有那么多内容读取了
            }

引用 2 楼 杀马特丶蛮牛 的回复:

试下这样

            var path = @"C:\Users\woshi\Desktop\5.mht";
            FileStream fs = new FileStream(path, FileMode.Open);
            long totalSize = fs.Length;                             //获取文件大小
            int singleSize = 1024;                                     //单次文件大小
            int sendNumber = (int)totalSize / singleSize;//发送次数

            byte[] bytes = new byte[singleSize];
            int num = 0;
            for (int i = 0; i < sendNumber; i++)
            {
                num = i * singleSize + num;
                fs.Position = num;
                num = fs.Read(bytes, 0, singleSize);
                //    client.Send(bytes);
            }
            if (totalSize - singleSize * sendNumber != 0)
            {
                fs.Position = num;
                byte[] overBytes = new byte[totalSize - singleSize * sendNumber];
                fs.Read(bytes, 0, overBytes.Length);
                //     client.Send(bytes);
            }
            //将文件读到byte数组中
            fs.Close();

[阿蒙Armon]

第二个参数和第三个参数，自己看一下