Small application Algorithms

Recently I am working on a small WPF project. I have to write a function because I need to process some data. It is a small algorithm. I want to write it here to help me learn new things. At the same time, I hope the cool guys will give me some advice and find out some shortcomings.

 

Simplified requirements:

Create a datatable table DT. The number of records in the DT table is M. Create able tables dt1, dt2, dt1, and dt2 to display the data in DT cyclically. Add a timer to regularly refresh the data in dt1 and dt2, and dt1 and dt2 can only display n rows at a time.

 

1. Declare Variables

Private dispatchertimer timer; datatable dt = new datatable (); datatable dt1 = new datatable (); datatable dt2 = new datatable (); public static int currentrows = 0; // The current row public static int currentrows2 = 0; // intermediate variable

View code

Timer:

timer = new DispatcherTimer();            timer.Interval = new TimeSpan(0, 0, 5);            timer.Tick += new EventHandler(timer_Tick);            timer.Start();

View code

 

2. Add a control. Here, add two DataGrid controls to display data in dt1 and dt2)

<DataGrid AutoGenerateColumns="False" Height="335" HorizontalAlignment="Left" Margin="220,12,0,0" Name="dataGrid1" VerticalAlignment="Top" Width="200" >            <DataGrid.Columns >                <DataGridTextColumn Header="id" Binding="{Binding Path=id}"></DataGridTextColumn>                <DataGridTextColumn Header="name" Binding="{Binding Path=name}"></DataGridTextColumn>            </DataGrid.Columns>        </DataGrid>        <DataGrid AutoGenerateColumns="False" Height="305" HorizontalAlignment="Left" Margin="463,31,0,0" Name="dataGrid2" VerticalAlignment="Top" Width="200" >            <DataGrid.Columns >                <DataGridTextColumn Header="id" Binding="{Binding Path=id}"></DataGridTextColumn>                <DataGridTextColumn Header="name" Binding="{Binding Path=name}"></DataGridTextColumn>            </DataGrid.Columns>        </DataGrid>

View code

 

3. Create a DT able table DT and initialize dt1 and dt2.

private void Initialize(int num)        {            dt.Columns.Add(new DataColumn("id", typeof(int)));            dt.Columns.Add(new DataColumn("name", typeof(string)));            for (int i = 0; i < num; i++)            {                DataRow dr = dt.NewRow();                dr["id"] = i;                dr["name"] = "tom" + i.ToString();                dt.Rows.Add(dr);            }            dt1.Columns.Add(new DataColumn("id", typeof(int)));            dt1.Columns.Add(new DataColumn("name", typeof(string)));            dt2.Columns.Add(new DataColumn("id", typeof(int)));            dt2.Columns.Add(new DataColumn("name", typeof(string)));        }

Call at initialization:

Initialize (11 );

 

4. Compile Functions

public void Update(int num)        {            int rows = dt.Rows.Count;            int num1 = 0;            int num2 = 0;            currentRows = currentRows2;            for (int i = currentRows; i < (currentRows + num); i++)            {                num1++;                currentRows2++;                DataRow dr = dt1.NewRow();                dr["id"] = Convert.ToInt32(dt.Rows[i][0].ToString());                dr["name"] = dt.Rows[i][1].ToString();                dt1.Rows.Add(dr);                if (i == rows - 1)                {                    i = -1;                    currentRows2 = 0;                }                if (num1 == num)                {                    break;                }            }            currentRows = currentRows2;            for (int i = currentRows; i < (currentRows + num); i++)            {                num2++;                currentRows2++;                DataRow dr = dt2.NewRow();                dr["id"] = Convert.ToInt32(dt.Rows[i][0].ToString());                dr["name"] = dt.Rows[i][1].ToString();                dt2.Rows.Add(dr);                if (i == rows - 1)                {                    i = -1;                    currentRows2 = 0;                }                if (num2 == num)                {                    break;                }            }        }

 

5. Regularly refresh data in dt1 and dt2

void timer_Tick(object sender, EventArgs e)        {            dt1.Clear();            dt2.Clear();            Update(3);            this.dataGrid1.ItemsSource = dt1.DefaultView;            this.dataGrid2.ItemsSource = dt2.DefaultView;        }

 

Small application Algorithms