文件块执行的维度

Question

下载后我有启动应用程序的代码

client.DownloadFileAsync(new Uri("http://mysite/myapplication.exe"),   tempPath + "\\" + sDownloadFileName);

                    try
                    {
                    string tempPath = System.IO.Path.GetTempPath();
                    Process.Start(tempPath + "myapplication.exe");                   
                    Application.Exit();
                    }
                    catch
                    {
                    MessageBox.Show"Error, the file is corrupt");
                    }

但是如果文件（http：//mysite/myapplication.exe）它不存在.. 一个文件创建相同的1KB，启动和返回错误=（ 是否可以阻止执行文件，如果它小到10 MB？

                    try
                    {
                    string tempPath = System.IO.Path.GetTempPath();                        
                    if (tempPath + "myapplication.exe" == -10 MB)
                    {
                    MessageBox.Show"Error, the file is corrupt");
                    }
                    else if
                    {
                    Process.Start(tempPath + "myapplication.exe");    
                    }
                    }

Answer 1

下载后使用FileInfo检查尺寸。

try
{
    string tempPath = System.IO.Path.GetTempPath(); 
    FileInfo fileInfo = new FileInfo(downloadFilePath);
    if (fileInfo.Length < 10*1000*1000)
    {
        MessageBox.Show"Error, the file is corrupt");
    }
    else if
    {
        Process.Start(tempPath + "myapplication.exe");    
    }
}