[英]How do I check if a file is a SQLite Database in C#?
當打開非數據庫文件時,SQLiteConnection.Open不會引發異常。
private void openDatabase()
{
sqlite = new SQLiteConnection("Data Source=" + this.filePath + ";Version=3;");
try
{
sqlite.Open();
}
catch(SQLiteException e)
{
MessageBox.Show(e.Message + e.StackTrace);
}
}
如何確定文件是否為SQLite數據庫?
讀取前16個字節,然后檢查字符串“ SQLite Format”
VB.Net
Dim bytes(16) As Byte
Using fs As New IO.FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)
fs.Read(bytes, 0, 16)
End Using
Dim chkStr As String = System.Text.ASCIIEncoding.ASCII.GetString(bytes)
Return chkStr.Contains("SQLite format")
更新2
C#
byte[] bytes = new byte[17];
using (IO.FileStream fs = new IO.FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) {
fs.Read(bytes, 0, 16);
}
string chkStr = System.Text.ASCIIEncoding.ASCII.GetString(bytes);
return chkStr.Contains("SQLite format");
public static bool isSQLiteDatabase(string pathToFile)
{
bool result = false;
if (File.Exists(pathToFile)) {
using (FileStream stream = new FileStream(pathToFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
byte[] header = new byte[16];
for (int i = 0; i < 16; i++)
{
header[i] = (byte)stream.ReadByte();
}
result = System.Text.Encoding.UTF8.GetString(header).Contains("SQLite format 3");
stream.Close();
}
}
return result;
}
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