0
我有代码使用OpenFileDialog读取数据(浏览),我将 读取的是图像,我将进入数据库,因此我做了 转换为字节数据类型,但是当我不浏览,并立即按下保存按钮, 会出错误对话框,任何人都可以帮我解决这个.. 的错误何以是我更换一个消息..打开文件时出错(浏览)
byte[] ReadFile(string sPath)
{
//Initialize byte array with a null value initially.
byte[] data = null;
//Use FileInfo object to get file size.
FileInfo fInfo = new FileInfo(sPath);
long numBytes = fInfo.Length;
//Open FileStream to read file
FileStream fStream = new FileStream(sPath, FileMode.Open, FileAccess.Read);
//Use BinaryReader to read file stream into byte array.
BinaryReader br = new BinaryReader(fStream);
//When you use BinaryReader, you need to supply number of bytes to read from file.
//In this case we want to read entire file. So supplying total number of bytes.
data = br.ReadBytes((int)numBytes);
return data;
}
private void btnImage_Click(object sender, EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
dlg.Filter = "JPG files (*.jpg)|*.jpg";
DialogResult dlgRes = dlg.ShowDialog();
if (dlgRes != DialogResult.Cancel)
{
pctImage.ImageLocation = dlg.FileName;
txtImage.Text = dlg.FileName;
}
}
当进入跨越多行代码,您不使用反引号。您需要将每行缩进四个空格。 – Amy
你会得到什么错误? – Fischermaen
注意,如果你只读入一个字节数组,你不需要'BinaryReader'。您可以使用['FileStream.Read(byte []数组,int start,int count)](http://msdn.microsoft.com/zh-cn/library/system.io.filestream.read.aspx ) 方法。 – Amy