private void button_result_clicked(object sender, EventArgs e)
{
label2.Text = label1.Text;
string expression = label1.Text.Trim();
try
{
var result = new System.Data.DataTable().Compute(expression, null);
if (result.GetType() == typeof(double))
{
result = Math.Round((double)result, 5);
}
if (result.GetType() == typeof(decimal))
{
result = Math.Round((decimal)result, 5);
}
string res = Convert.ToString(result);
if (res.Contains(','))
{
res = res.Replace(',', '.');
}
label1.Text = res;
}
catch (Exception)
{
label1.Text = "Error";
}
}
public static void Serialization()
{
// http://www.java2s.com/Tutorial/CSharp/0220__Data-Structure/SerializeanArrayListobjecttoabinaryfile.htm
// http://www.java2s.com/Tutorial/CSharp/0220__Data-Structure/DeserializeanArrayListobjectfromabinaryfile.htm
System.Data.DataTable dt = new System.Data.DataTable();
dt.Columns.Add("abc", typeof(string));
dt.Columns.Add("def", typeof(int));
System.Data.DataRow dr = dt.NewRow();
dr["abc"] = "test1";
dr["def"] = 123;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["abc"] = "test2";
dr["def"] = 456;
dt.Rows.Add(dr);
System.Data.DataSet ds = new System.Data.DataSet();
ds.Tables.Add(dt);
Console.WriteLine("tname: " + dt.GetType().FullName);
cSessionData ObjectToSerialize1 = new cSessionData("key1", "value1");
cSessionData ObjectToSerialize2 = new cSessionData("key2", "value2");
cSessionData ObjectToSerialize3 = new cSessionData("key3", dt);
System.Collections.ArrayList al = new System.Collections.ArrayList();
al.Add(ObjectToSerialize1);
al.Add(ObjectToSerialize2);
al.Add(ObjectToSerialize3);
string strSerializedItem = Serialize(al);
Console.WriteLine(strSerializedItem);
Deserialize(strSerializedItem);
}