Hello,everyone..I am a beginner in using c#.
Now, i have some problems in my project. I hope someone can help me.
Below is my coding:-
public partial class Form1 : Form
{
string file;
double allTransaction;
SortedList frequency = new SortedList();
SortedList<string, double> m_dicAllFrequentItems = new SortedList<string, double>();
SortedList<int, String> m_dicTransactions = new SortedList<int, string>();
SortedList<string, double> dicFrequency = new SortedList<string, double>();
int m_nLastTransId;
public Form1()
{
InitializeComponent();
}
//browse file
private void button1_Click(object sender, EventArgs e)
{
int size = -1;
DialogResult result = new DialogResult(); //Dialog result sets the openfile dialog result
result = openFileDialog1.ShowDialog(); // Show the dialog.
if (result == DialogResult.OK) // Test result.
{
textBox1.Text = openFileDialog1.FileName;
file = openFileDialog1.FileName;
try
{
StringBuilder sb = new StringBuilder();
string text = File.ReadAllText(file);
textBox2.Text = text;
size = text.Length;
}
catch (IOException)
{
}
}
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
//list all the content
}
//user enter min.threshold
private void textBox3_TextChanged(object sender, EventArgs e)
{
}
string[] c;
List<String> sortlist;
string[] nCombination;
private void button2_Click(object sender, EventArgs e)
{
ColumnHeader itemset = new ColumnHeader();
itemset.Text = "Itemset";
itemset.Width = 100;
listView1.Columns.Add(itemset);
ColumnHeader itemsupport = new ColumnHeader();
itemsupport.Text = "Support";
itemsupport.Width = 50;
listView1.Columns.Add(itemsupport);
listView1.Items.Clear();
int size = -1;
string output = "";
string text = File.ReadAllText(file);
size = text.Length;
// int count = 0;
string b;
b = text.Replace("\r\n", " ");
output += b;
c = output.Split(' ');
sortlist = new List<String>(c);
sortlist.Sort();
var fr = sortlist.GroupBy(n => n).Select(n => new { Value = n.Key, Count = n.Count() });
StringBuilder sb = new StringBuilder();
foreach (var f in fr)
{
if (f.Count > 1)
{
ListViewItem lvi = new ListViewItem(f.Value);
frequency.Add(f.Value, f.Count);
dicFrequency.Add(f.Value, f.Count);
lvi.SubItems.Add((f.Count).ToString());
listView1.Items.Add(lvi);
}
}
nCombination = new string[frequency.Count];
int ii = 0;
foreach (string strItem in frequency.Keys)
{
nCombination[ii] = strItem;
ii++;
}
}
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
private SortedList<string, double> GetFrequentItems(SortedList<string, double> dic_Candidates, double dMinSupport)
{
SortedList<string, double> dic_FrequentReturn = new SortedList<string, double>();
for (int i = dic_Candidates.Count - 1; i >= 0; i--)
{
string strItem = dic_Candidates.Keys.ElementAt(i);
double dSupport = dic_Candidates[strItem];
if ((dSupport / (double)(m_nLastTransId - 1) >= dMinSupport))
{
dic_FrequentReturn.Add(strItem, dSupport);
m_dicAllFrequentItems.Add(strItem, dSupport);
}
}
return dic_FrequentReturn;
}
private SortedList<string, double> GenerateCandidates(SortedList<string, double> dic_FrequentItems)
{
SortedList<string, double> dic_CandidatesReturn = new SortedList<string, double>();
for (int i = 0; i < dic_FrequentItems.Count - 1; i++)
{
string strFirstItem = dic_FrequentItems.Keys.ElementAt(i);
for (int j = i + 1; j < dic_FrequentItems.Count; j++)
{
string strSecondItem = dic_FrequentItems.Keys.ElementAt(j);
string strGeneratedCandidate = GetCandidate(strFirstItem, strSecondItem);
if (strGeneratedCandidate != string.Empty)
{
double dSupport = GetSupport(strGeneratedCandidate);
dic_CandidatesReturn.Add(strGeneratedCandidate, dSupport);
}
}
}
return dic_CandidatesReturn;
}
private string Alphabetize(string strToken)
{
// Convert to string array, then sort and return
string[] arrToken = strToken.Split(' ');
Array.Sort(arrToken);
string text2 = "";
for (int i = 0; i < arrToken.Length - 1; i++)
{
if (i == arrToken.Length - 2)
text2 += (arrToken[i]);//no space at the back because to prevent there have space at the end of itemset.the space can give error to other keys
else
text2 += (arrToken[i] + " ");
}
return text2;
}
private bool IsSubstring(string strChild, string strParent)
{
string[] splitlineitem = strChild.Split(' ');
foreach (string c in splitlineitem)
{
if (!strParent.Contains(c))
{
return false;
}
}
return true;
}
private string GetCandidate(string strFirstItem, string strSecondItem)
{
int nLength = strFirstItem.Length;
if (nLength == 2)
{
return (strFirstItem + " " + strSecondItem);
}
else
{
string strFirstSubString = strFirstItem.Substring(0, nLength - 2);
string strSecondSubString = strSecondItem.Substring(0, nLength - 2);
if (strFirstSubString == strSecondSubString)
{
return (strFirstItem + " " + strSecondItem[nLength - 2] + strSecondItem[nLength - 1]);
}
else
return string.Empty;
}
}
private SortedList<string, double> GetL1FrequentItems(double dMinSupport)
{
m_dicAllFrequentItems.Clear();
SortedList<string, double> dic_FrequentItemsReturn = new SortedList<string, double>();
foreach (string lviItem in dicFrequency.Keys)
{
double dSupport = GetSupport(lviItem);
if ((dSupport / (double)(m_nLastTransId - 1) >= dMinSupport))
{
dic_FrequentItemsReturn.Add(lviItem, dSupport);
m_dicAllFrequentItems.Add(lviItem, dSupport);
}
}
return dic_FrequentItemsReturn;
}
private double GetSupport(string strGeneratedCandidate)
{
double dSupportReturn = 0;
foreach (string strTransaction in m_dicTransactions.Values)
{
if (IsSubstring(strGeneratedCandidate, strTransaction))
{
dSupportReturn++;
}
}
return dSupportReturn;
}
private void button3_Click(object sender, EventArgs e)
{
try
{
listView1.Items.Clear();
string line;
SortedList patternList = new SortedList();
StreamReader filename = new StreamReader(file);
while ((line = filename.ReadLine()) != null)
{
m_dicTransactions.Add(m_nLastTransId, line);
m_nLastTransId++;
}
double dMinSupport = 0;
if (textBox3.Text != "")
{
dMinSupport = double.Parse(textBox3.Text) / 100;
SortedList<string, double> dic_FrequentItemsL1 = new SortedList<string, double>();
SortedList<string, double> dic_FrequentItems = new SortedList<string, double>();
dic_FrequentItemsL1 = GetL1FrequentItems(dMinSupport);
dic_FrequentItems = dic_FrequentItemsL1;
foreach (string oneItem in dic_FrequentItems.Keys)
{
ListViewItem lvi = new ListViewItem(oneItem);
lvi.SubItems.Add(dic_FrequentItems[oneItem].ToString());
listView1.Items.Add(lvi);
}
//declare new dic name dic_Candidate
SortedList<string, double> dic_Candidates = new SortedList<string, double>();
do
{
dic_Candidates = GenerateCandidates(dic_FrequentItems);
dic_FrequentItems = GetFrequentItems(dic_Candidates, dMinSupport);
foreach (string oneItem in dic_FrequentItems.Keys)
{
ListViewItem lvi = new ListViewItem(oneItem);
lvi.SubItems.Add(dic_FrequentItems[oneItem].ToString());
listView1.Items.Add(lvi);
}
}
while (dic_Candidates.Count != 0);
}
else
{
MessageBox.Show("Must put an integer!");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
//button to generate result but the association rules cant display???
private void button5_Click(object sender, EventArgs e)
{
ColumnHeader itemset = new ColumnHeader();
itemset.Text = "Association Rule(s)";
itemset.Width = 110;
listView2.Columns.Add(itemset);
ColumnHeader supp = new ColumnHeader();
supp.Text = "Support(%)";
supp.Width = 70;
listView2.Columns.Add(supp);
ColumnHeader conf = new ColumnHeader();
conf.Text = "Confident(%)";
conf.Width = 90;
listView2.Columns.Add(conf);
ColumnHeader lift = new ColumnHeader();
lift.Text = "Lift";
lift.Width = 60;
listView2.Columns.Add(lift);
listView2.Items.Clear();
int size = -1;
string lstStrongRulesReturn = "";
}
SortedList<string, double> lstStrongRules = new SortedList<string, double>();
private void LoadRules(List<clssRules> lstStrongRules)
{
foreach (clssRules Rule in lstStrongRules)
{
ListViewItem lvi = new ListViewItem(Rule.X + "-->" + Rule.Y);
lvi.SubItems.Add(String.Format("{0:0.00}", (Rule.Confidence * 100)) + "%");
listView2.Items.Add(lvi);
}
}
//generate rules but nid to change the text box name testing
private List<clssRules> GetStrongRules(double dMinConfidence, List<clssRules> lstRules)
{
List<clssRules> lstStrongRulesReturn = new List<clssRules>();
foreach (clssRules Rule in lstRules)
{
string strXY = Alphabetize(Rule.X + Rule.Y);
AddStrongRule(Rule, strXY, ref lstStrongRulesReturn, dMinConfidence);
}
lstStrongRulesReturn.Sort();
return lstStrongRulesReturn;
}
private void AddStrongRule(clssRules Rule, string strXY, ref List<clssRules> lstStrongRulesReturn, double dMinConfidence)
{
double dConfidence = GetConfidence(Rule.X, strXY);
clssRules NewRule;
if (dConfidence >= dMinConfidence)
{
NewRule = new clssRules(Rule.X, Rule.Y, dConfidence);
lstStrongRulesReturn.Add(NewRule);
}
dConfidence = GetConfidence(Rule.Y, strXY);
if (dConfidence >= dMinConfidence)
{
NewRule = new clssRules(Rule.Y, Rule.X, dConfidence);
lstStrongRulesReturn.Add(NewRule);
}
}
private double GetConfidence(string strX, string strXY)
{
double dSupport_X, dSupport_XY;
dSupport_X = m_dicAllFrequentItems[strX];
dSupport_XY = m_dicAllFrequentItems[strXY];
return dSupport_XY / dSupport_X;
}
private List<clssRules> GenerateRules()
{
List<clssRules> lstRulesReturn = new List<clssRules>();
foreach (string strItem in m_dicAllFrequentItems.Keys)
{
if (strItem.Length > 1)
{
int nMaxCombinationLength = strItem.Length / 2;
// GenerateCombination(strItem, nMaxCombinationLength, ref lstRulesReturn);
}
}
return lstRulesReturn;
}
//list all the AR and confident, lift
private void listView2_SelectedIndexChanged(object sender, EventArgs e)
{
}
//read total positive AR
private void textBox4_TextChanged(object sender, EventArgs e)
{
}
//read total negative AR
private void textBox5_TextChanged(object sender, EventArgs e)
{
}
//button ok
private void button4_Click(object sender, EventArgs e)
{
DialogResult settle = MessageBox.Show("Do you want to exit?", "Exit Confirmation", MessageBoxButtons.YesNo);
if (settle == DialogResult.Yes)
Application.Exit();
}
}
}
