Create DataSet pragmatically : DataSet « ADO.net Database « ASP.Net

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ASP.Net » ADO.net Database » DataSet 
Create DataSet pragmatically

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="Default_aspx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="Bugs" 
                      runat="server" 
                      CellPadding="4" 
                      ForeColor="#333333" 
                      GridLines="None">
            <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <RowStyle BackColor="#EFF3FB" />
            <PagerStyle BackColor="#2461BF" 
                        ForeColor="White" 
                        HorizontalAlign="Center" />
            <SelectedRowStyle BackColor="#D1DDF1" 
                              Font-Bold="True" 
                              ForeColor="#333333" />
            <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <EditRowStyle BackColor="#2461BF" />
            <AlternatingRowStyle BackColor="White" />
        </asp:GridView>
    
        <asp:GridView ID="BugConstraints" 
                      runat="server" 
                      BackColor="#DEBA84" 
                      BorderColor="#DEBA84"
                      BorderStyle="None" 
                      BorderWidth="1px" 
                      CellPadding="3" 
                      CellSpacing="2">
            <FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
            <RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
            <PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
            <SelectedRowStyle BackColor="#738A9C" Font-Bold="True"
                ForeColor="White" />
            <HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
        </asp:GridView>
  </div>
    </form>
</body>
</html>

File: Default.aspx.cs
 
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Default_aspx : System.Web.UI.Page 
{
  protected void Page_Load(object sender, EventArgs e)
  {
    if (!IsPostBack)
    {
      DataSet ds = CreateDataSet();

      Bugs.DataSource = ds.Tables["Bugs"];
      Bugs.DataBind();

      BugConstraints.DataSource = ds.Tables["Bugs"].Constraints;
      BugConstraints.DataBind();
    }
  }

    private DataSet CreateDataSet(  )
    {
      DataSet dataSet = new DataSet();

      DataTable tblBugs = new DataTable("Bugs");

      DataColumn newColumn; 

      newColumn = tblBugs.Columns.Add("BugID", Type.GetType("System.Int32"));
      newColumn.AutoIncrement = true;     
      newColumn.AutoIncrementSeed = 1;    
      newColumn.AutoIncrementStep = 1;    
      newColumn.AllowDBNull = false;      
      //newColumn.Unique = true;

      UniqueConstraint constraint = new UniqueConstraint("Unique_BugID", newColumn);
      tblBugs.Constraints.Add(constraint);

      DataColumn[] columnArray = new DataColumn[1];
      columnArray[0= newColumn;

      tblBugs.PrimaryKey = columnArray;

      newColumn = tblBugs.Columns.Add("Product", Type.GetType("System.Int32"));
      newColumn.AllowDBNull = false;
      newColumn.DefaultValue = 1;

      DataColumn bugProductColumn = newColumn;

      newColumn = tblBugs.Columns.Add("Version", Type.GetType("System.String"));
      newColumn.AllowDBNull = false;
      newColumn.MaxLength = 50;
      newColumn.DefaultValue = "0.1";

      newColumn = tblBugs.Columns.Add"Description", Type.GetType("System.String"));
      newColumn.AllowDBNull = false;
      newColumn.MaxLength = 8000;
      newColumn.DefaultValue = "";

      newColumn = tblBugs.Columns.Add("Reporter", Type.GetType("System.Int32"));
      newColumn.AllowDBNull = false;

      DataColumn bugReporterColumn = newColumn;

      DataRow newRow;

      newRow = tblBugs.NewRow();
      newRow["Product"1;
      newRow["Version""0.1";
      newRow["Description""D1";
      newRow["Reporter"5;
      tblBugs.Rows.Add(newRow);

      newRow = tblBugs.NewRow();
      newRow["Product"1;
      newRow["Version""0.1";
      newRow["Description""D2";
      newRow["Reporter"5;
      tblBugs.Rows.Add(newRow);

      newRow = tblBugs.NewRow();
      newRow["Product"1;
      newRow["Version""0.1";
      newRow["Description""D3";
      newRow["Reporter"6;
      tblBugs.Rows.Add(newRow);

      newRow = tblBugs.NewRow();
      newRow["Product"1;
      newRow["Version""0.1";
      newRow["Description""D4";
      newRow["Reporter"5;
      tblBugs.Rows.Add(newRow);

      newRow = tblBugs.NewRow();
      newRow["Product"2;
      newRow["Version""0.1";
      newRow["Description""D5";
      newRow["Reporter"5;
      tblBugs.Rows.Add(newRow);

      newRow = tblBugs.NewRow();
      newRow["Product"2;
      newRow["Version""0.1";
      newRow["Description""D6";
      newRow["Reporter"6;
      tblBugs.Rows.Add(newRow);

      dataSet.Tables.Add(tblBugs);

      DataTable tblProduct = new DataTable("lkProduct");
      newColumn = tblProduct.Columns.Add("ProductID", Type.GetType("System.Int32"));
      newColumn.AutoIncrement = true;
      newColumn.AutoIncrementSeed = 1;
      newColumn.AutoIncrementStep = 1;
      newColumn.AllowDBNull = false;  
      newColumn.Unique = true;        

      newColumn = tblProduct.Columns.Add("ProductDescription", Type.GetType("System.String"));
      newColumn.AllowDBNull = false;
      newColumn.MaxLength = 8000;
      newColumn.DefaultValue = "";

      newRow = tblProduct.NewRow();
      newRow["ProductDescription""Bug Tracking";
      tblProduct.Rows.Add(newRow);

      newRow = tblProduct.NewRow();
      newRow["ProductDescription""Information Manager";
      tblProduct.Rows.Add(newRow);

      dataSet.Tables.Add(tblProduct);


      DataTable tblPeople = new DataTable("People");
      newColumn = tblPeople.Columns.Add("PersonID", Type.GetType("System.Int32"));
      newColumn.AutoIncrement = true;     
      newColumn.AutoIncrementSeed = 1;    
      newColumn.AutoIncrementStep = 1;    
      newColumn.AllowDBNull = false;      

      UniqueConstraint uniqueConstraint = new UniqueConstraint("Unique_PersonID", newColumn);
      tblPeople.Constraints.Add(uniqueConstraint);

      DataColumn PersonIDColumn = newColumn;

      columnArray = new DataColumn[1];
      columnArray[0= newColumn;
      tblPeople.PrimaryKey = columnArray;


      newColumn = tblPeople.Columns.Add("FullName", Type.GetType("System.String"));
      newColumn.AllowDBNull = false;
      newColumn.MaxLength = 80;
      newColumn.DefaultValue = "";

      newColumn = tblPeople.Columns.Add("eMail", Type.GetType("System.String"));
      newColumn.AllowDBNull = false;
      newColumn.MaxLength = 100;
      newColumn.DefaultValue = "";

      newColumn = tblPeople.Columns.Add("Phone", Type.GetType("System.String"));
      newColumn.AllowDBNull = false;
      newColumn.MaxLength = 20;
      newColumn.DefaultValue = "";

      newColumn = tblPeople.Columns.Add("Role", Type.GetType("System.Int32"));
      newColumn.DefaultValue = 0;
      newColumn.AllowDBNull = false;

      newRow = tblPeople.NewRow();
      newRow["FullName""Jason";
      newRow["email""j@server.com";
      newRow["Phone""123-111-1111";
      newRow["Role"1;
      tblPeople.Rows.Add(newRow);

      newRow = tblPeople.NewRow();
      newRow["FullName""Dole";
      newRow["email""d@server.com";
      newRow["Phone""234-111-2222";
      newRow["Role"1;
      tblPeople.Rows.Add(newRow);

      newRow = tblPeople.NewRow();
      newRow["FullName""John";
      newRow["email""j@server.com";
      newRow["Phone""345-222-3333";
      newRow["Role"1;
      tblPeople.Rows.Add(newRow);

      newRow = tblPeople.NewRow();
      newRow["FullName""Jess";
      newRow["email""j@server.com";
      newRow["Phone""456-333-4444";
      newRow["Role"3;
      tblPeople.Rows.Add(newRow);

      newRow = tblPeople.NewRow();
      newRow["FullName""Ron";
      newRow["email""ron@server.com";
      newRow["Phone""567-555-5555";
      newRow["Role"2;
      tblPeople.Rows.Add(newRow);

      newRow = tblPeople.NewRow();
      newRow["FullName""Tank";
      newRow["email""t@server.com";
      newRow["Phone""617-555-1234";
      newRow["Role"2;
      tblPeople.Rows.Add(newRow);

      dataSet.Tables.Add(tblPeople);

      ForeignKeyConstraint fk = new ForeignKeyConstraint("FK_BugToPeople", PersonIDColumn, bugReporterColumn);
      fk.DeleteRule = Rule.Cascade;   
      fk.UpdateRule = Rule.Cascade;
      tblBugs.Constraints.Add(fk);  

      System.Data.DataRelation dataRelation;
      System.Data.DataColumn dataColumn1;
      System.Data.DataColumn dataColumn2;

      dataColumn1 = dataSet.Tables["People"].Columns["PersonID"];
      dataColumn2 = dataSet.Tables["Bugs"].Columns["Reporter"];

      dataRelation = new System.Data.DataRelation("BugsToReporter",dataColumn1,dataColumn2);

      dataSet.Relations.Add(dataRelation);

      return dataSet;
    }
}

 
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