public static SqlTool getInstance()
{
if(null == instance)
{
instance = new SqlTool();
}
return instance;
}
public static SqlTool getInstance()
{
if (null == instance)
{
instance = new SqlTool();
}
return(instance);
}
public static SqlTool getInstance(string connStr)
{
if(null == instance)
{
connection = new OleDbConnection("".Equals(connStr) ? connectionString : connStr);
instance = new SqlTool();
}
return instance;
}
public static SqlTool getInstance(string connStr)
{
if (null == instance)
{
connection = new OleDbConnection("".Equals(connStr) ? connectionString : connStr);
instance = new SqlTool();
}
return(instance);
}
