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我有代碼使用OpenFileDialog讀取數據(瀏覽),我將 讀取的是圖像,我將進入數據庫,因此我做了 轉換爲字節數據類型,但是當我不瀏覽,並立即按下保存按鈕, 會出錯誤對話框,任何人都可以幫我解決這個.. 的錯誤何以是我更換一個消息..打開文件時出錯(瀏覽)
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;
}
}
當進入跨越多行代碼,您不使用反引號。您需要將每行縮進四個空格。 – Amy
你會得到什麼錯誤? – Fischermaen
注意,如果你只讀入一個字節數組,你不需要'BinaryReader'。您可以使用['FileStream.Read(byte []數組,int start,int count)](http://msdn.microsoft.com/zh-cn/library/system.io.filestream.read.aspx ) 方法。 – Amy