/// <summary>
/// 数据库是否存在
/// </summary>
public Boolean dbExists(String dbName)
{
bool exist = false;
using (var dr = SQLServerHelper.ExecuteReader(
String.Format(connectionString3, dataSource),
String.Format(Sql.DB_EXISTS, Path.GetFileNameWithoutExtension(dbName), Path.GetDirectoryName(dbName)),
CommandType.Text)) {
exist = dr != null && dr.HasRows;
}
// 数据库文件被手动删除，drop一次
if (exist && !File.Exists(dbName))
{
try {
SQLServerHelper.ExecuteNonQuery(
String.Format(connectionString3, dataSource),
String.Format(Sql.DELETE_DB, Path.GetFileNameWithoutExtension(dbName)),
CommandType.Text);
}
catch (SqlException) { }
finally {
exist = false;
}
}
return(exist);
}
/// <summary>
/// 当前连接，是否存在表
/// </summary>
public Boolean tableExists(String dbName, String tableName)
{
using (var dr = SQLServerHelper.ExecuteReader(
String.Format(connectionString1, dataSource),
String.Format(Sql.TABLE_EXISTS, tableName),
CommandType.Text)) {
return(dr != null && dr.HasRows);
}
}
public Boolean IsExist(String username)
{
using (var dr = SQLServerHelper.ExecuteReader(
String.Format(connectionString1, getDBName()),
String.Format("select count(*) from {0} where UserName='******'",
this.getTableName(), username),
CommandType.Text)) {
return((dr != null && dr.Read()) ? dr.GetInt32(0) != 0 : false);
}
}
/// <summary>
/// 获取数据库中所有表名
/// </summary>
public List <String> getTableNames(String dbName)
{
List <String> tables = new List <String>();
var dr = SQLServerHelper.ExecuteReader(
String.Format(connectionString1, dataSource),
Sql.GET_ALL_TABLE_NAME,
CommandType.Text);
while (dr != null && dr.Read())
{
tables.Add(dr[0].ToString());
}
return(tables);
}
public Boolean IsMatch(User user)
{
if (user == null)
{
return(false);
}
using (var dr = SQLServerHelper.ExecuteReader(
String.Format(connectionString1, getDBName()),
String.Format("select count(*) from {0} where UserName={1} and PassWord={2}",
this.getTableName(), user.UserName, user.PassWord),
CommandType.Text)) {
return((dr != null && dr.Read()) ? dr.GetBoolean(0) : false);
}
}
