Sunday, March 21, 2010

Custom Search Bar With Auto-Complete

Learn to create custom search bars in Web Site Factory and Web Site Builder projects. The search bars are typically displayed above the grid views. Use any standard and commercial ASP.NET controls to capture the search parameters. We will show you how to implement a predictive input in your search fields without writing any code.

Custom Search Bar With Auto-Complete in ASP.NET/AJAX Web Apps

Watch this tutorial on our YouTube channel at http://www.youtube.com/watch?v=W91JgqSfKsM.

Here is the custom search bar of the sample application discussed in the tutorial when displayed in Google Chrome.

image

The markup of the ASP.NET user control from the example is presented below.

<%@ Control Language="VB" AutoEventWireup="false" CodeFile="SearchControl.ascx.vb"
    Inherits="Controls_SearchControl" %>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
        <div class="SettingsPanel">
            <table>
                <tr>
                    <td>
                        Product:<br />
                        <aquarium:DataViewTextBox ID="ProductNameText" runat="server" 
                            DataController="Products" DistinctValueFieldName="ProductName" />
                    </td>
                    <td>
                        Supplier:<br />
                        <aquarium:DataViewTextBox ID="SupplierCompanyNameText" runat="server" 
                            DataController="Products" DistinctValueFieldName="SupplierCompanyName" />
                    </td>
                    <td>
                        Category:<br />
                        <aquarium:DataViewTextBox ID="CategoryCategoryNameText" runat="server" 
                            DataController="Products" DistinctValueFieldName="CategoryCategoryName" />
                    </td>
                    <td>
                        <br />
                        <asp:Button ID="SearchButton" runat="server" Text="Search" />
                    </td>
                </tr>
            </table>
        </div>
    </ContentTemplate>
</asp:UpdatePanel>
<div id="ProductList" runat="server">
</div>
<aquarium:DataViewExtender ID="ProductListExtender" runat="server" TargetControlID="ProductList"
    Controller="Products" ShowDescription="false" ShowQuickFind="false" />

Here is the code-behind class written in Visual Basic that uses DataViewExtender.AssignFilter method to execute the search operation in the client browser in response to the button pressed on the custom search bar.

Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports MyCompany.Data
Imports MyCompany.Web

Partial Public Class Controls_SearchControl
    Inherits System.Web.UI.UserControl
    
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
        If Not IsPostBack Then
            ProductNameText.Text = Session("ProductName")
            SupplierCompanyNameText.Text = Session("SupplierCompanyName")
            CategoryCategoryNameText.Text = Session("CategoryCategoryName")
        End If
    End Sub

    Protected Sub SearchButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles SearchButton.Click
        Dim filter As List(Of FieldFilter) = New List(Of FieldFilter)
        If String.IsNullOrEmpty(ProductNameText.Text) Then
            filter.Add(New FieldFilter("ProductName", RowFilterOperation.None))
        Else
            filter.Add(New FieldFilter("ProductName", RowFilterOperation.Like, ProductNameText.Text))
        End If
        If String.IsNullOrEmpty(SupplierCompanyNameText.Text) Then
            filter.Add(New FieldFilter("SupplierCompanyName", RowFilterOperation.None))
        Else
            filter.Add(New FieldFilter("SupplierCompanyName", RowFilterOperation.Like, SupplierCompanyNameText.Text))
        End If
        If String.IsNullOrEmpty(CategoryCategoryNameText.Text) Then
            filter.Add(New FieldFilter("CategoryCategoryName", RowFilterOperation.None))
        Else
            filter.Add(New FieldFilter("CategoryCategoryName", RowFilterOperation.Like, CategoryCategoryNameText.Text))
        End If
        ProductListExtender.AssignFilter(filter)
        ProductNameText.Focus()
        Session("ProductName") = ProductNameText.Text
        Session("SupplierCompanyName") = SupplierCompanyNameText.Text
        Session("CategoryCategoryName") = CategoryCategoryNameText.Text
    End Sub
End Class

No comments:

You can find more about Code OnTime Generator, Data Aquarium Framework, and other great products here.


© 2010 Code OnTime LLC. Intelligent code generation software for ASP.NET. Visit us at http://codeontime.com