using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using Utilities;

using System.Data;

using System.Text; // needed for StringBuilder

using System.IO; // needed for StringWriter

namespace GridViews

{

public partial class DynamicDisplay2 : System.Web.UI.Page

{

DBConnect objDB = new DBConnect();

String strSQL = "";

protected void Page_Load(object sender, EventArgs e)

{

// Bind the dataset data to the drop-down list during intial page load

// set the text displayed in the list to the DeparmentName field value

// and the value of a selected item to the DepartmentNumber field value

if (!IsPostBack)

{

strSQL = "SELECT * FROM Department";

ddlProducts.DataSource = objDB.GetDataSet(strSQL);

ddlProducts.DataTextField = "DepartmentName";

ddlProducts.DataValueField = "DepartmentNumber";

ddlProducts.DataBind();

}

}

protected void ddlProducts_SelectedIndexChanged(object sender, EventArgs e)

{

GenerateProductsTable(ddlProducts.SelectedValue);

}

// This procedure builds an HTML table that displays information about each record

// contained in the DataSet dsProductList

private void GenerateProductsTable(String theDepartmentID)

{

DataSet dsProductList;

DataTable dtProducts; // used to reference a table in the dataset

DataRow drProductRecord; // used to reference a singe row (record) from the dataset

String strHTML = "";

strSQL = "SELECT ProductNumber, Description, QOH, Price FROM Product " +

"WHERE DepartmentNumber = " + theDepartmentID;

dsProductList = objDB.GetDataSet(strSQL);

// Retrieve a reference to the table in the DataSet that contains the records

// returned by the SQL query.

dtProducts = dsProductList.Tables[0];

if (dtProducts.Rows.Count != 0)

{

// Start the HTML table

strHTML = strHTML + "<table>" +

"<tr style='font-weight:bold'>" +

"<td> Product ID </td>" +

"<td> Description </td>" +

"<td> Quantity in Stock </td>" +

"<td> Price </td>" +

"</tr>";

// Build an HTML table row for each record in the DataTable dtProducts

// with data contained in the record.

for (int row = 0; row < dtProducts.Rows.Count; row++)

{

// Retrieve a reference to the current DataRow (record in the DataTable

drProductRecord = dtProducts.Rows[row];

// Create a Texbox used to bind the QOH for each record

TextBox TBox = new TextBox();

String TBoxHTML = "";

TBox.Text = drProductRecord["QOH"].ToString();

TBox.ID = "txt" + row;

TBox.Width = 50;

// Render a server control object into an HTML string

StringBuilder strBuilder = new StringBuilder();

StringWriter strWriter = new StringWriter(strBuilder);

HtmlTextWriter htmlWriter = new HtmlTextWriter(strWriter);

TBox.RenderControl(htmlWriter);

TBoxHTML = strBuilder.ToString();

// Create an HTML row for this record and its values

strHTML = strHTML + "<tr>" +

"<td>" + drProductRecord["ProductNumber"] + "</td>" +

"<td>" + drProductRecord["Description"] + "</td>" +

"<td>" + TBoxHTML + "</td>" +

"<td>" + String.Format("{0:c}", drProductRecord["Price"]) + "</td>" +

"</tr>";

}

// End the HTML table

strHTML += "</table>";

}

// Write the HTML string for the table to a DIV in the HTML markup of the ASPX page

divDisplay.InnerHtml = strHTML;

}

}

}