Computer Programming

Friday, October 23, 2015

October 23, 2015

WPF Listview items with images

WPF ListView is a container of other single controls. I mean to say that you can put other single control in it. Other controls considered as a Listview item. You can put only simple single string or control like TextBlock. Lets to check the demo of this line.

1:     <ListView>  
2:        <ListViewItem>  
3:          <TextBlock Text="Fruits"/>  
4:        </ListViewItem>  
5:        <ListViewItem>  
6:          Vegetables  
7:        </ListViewItem>  
8:      </ListView>

In this code, we have both string as well control. You can take other containers in it like StackPanel etc. as a ListView Item. In previous example, i taken Gridview control as view of Listview. Now, i will take image with Text in it as a single WPF Listview item.

1:  <ListView>  
2:        <ListViewItem>  
3:          <StackPanel Orientation="Horizontal">  
4:            <Image Source="apple.png"/>  
5:            <TextBlock Text="Apple"/>  
6:          </StackPanel>         
7:        </ListViewItem>  
8:        <ListViewItem>  
9:          <StackPanel Orientation="Horizontal">  
10:            <Image Source="mango.png"/>  
11:            <TextBlock Text="mango"/>  
12:          </StackPanel>  
13:        </ListViewItem>  
14:        <ListViewItem>  
15:          <StackPanel Orientation="Horizontal">  
16:            <Image Source="grapes.png"/>  
17:            <TextBlock Text="grapes"/>  
18:          </StackPanel>  
19:        </ListViewItem>  
20:      </ListView>

Copy this code and paste into your WPF window, before doing this, please add three image into your project,. These three images names are apple.png, mango.png and grapes.png.

ASP.NET ASP.NET fileupload control

October 23, 2015

ASP.NET FILEUPLOAD CONTROL CHANGE BACKGROUND COLOR USING CODE

Each control in ASP.NET ToolBox of visual studio, treat as a class. Property window shows the behavior of their controls also contains some common property, such as back-color, border color etc. Now in this article, we will take a simple example to change the background color of ASP.NET file upload control.

Description
I explained, ASP.NET FILEUPLOAD CONTROL change border color, File upload control enable/disable.

Source code

 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="fileupload_backcolor.aspx.cs" Inherits="fileupload_backcolor" %>  
 <!DOCTYPE html>  
 <html xmlns="http://www.w3.org/1999/xhtml">  
 <head runat="server">  
   <title></title>  
 </head>  
 <body>  
   <form id="form1" runat="server">  
   <div>  
     Enter Alpha color :  
     <asp:TextBox ID="TextBox1" runat="server" Width="202px"></asp:TextBox>  
     <br />  
     Enter Red Color :  
     <asp:TextBox ID="TextBox2" runat="server" Width="202px"></asp:TextBox>  
     <br />  
     Enter Green Color:  
     <asp:TextBox ID="TextBox3" runat="server" Width="202px"></asp:TextBox>  
     <br />  
     Enter Blue Color&nbsp;&nbsp; :  
     <asp:TextBox ID="TextBox4" runat="server" Width="202px"></asp:TextBox>  
     <br />  
     <br />  
     <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Change Fileupload background color" Width="260px" />  
     <br />  
     <br />  
   </div>  
     <asp:FileUpload ID="FileUpload1" runat="server" Height="51px" Width="311px" />  
   </form>  
 </body>  
 </html>

Code Behind Code

 using System;  
 using System.Collections.Generic;  
 using System.Linq;  
 using System.Web;  
 using System.Web.UI;  
 using System.Web.UI.WebControls;  
 public partial class fileupload_backcolor : System.Web.UI.Page  
 {  
   protected void Page_Load(object sender, EventArgs e)  
   {  
   }  
   protected void Button1_Click(object sender, EventArgs e)  
   {  
     int alpha = int.Parse(TextBox1 .Text);  
     int red = int.Parse(TextBox2.Text);  
     int green = int.Parse(TextBox3.Text);  
     int blue = int.Parse(TextBox4.Text);  
     FileUpload1.BackColor = System.Drawing.Color.FromArgb(alpha, red, green, blue);  
   }  
 }

Code Generate the following output

programmatically change background color of fileupload control in ASP.NET

In this example, we are taking four textboxes, one button, one file upload control. Using text box we can input the color code value and pass these values into the FromArgb ( ) method. This example is basically designed for users, who want to change the color of file upload control at run time.

Thursday, October 22, 2015

WPF

October 22, 2015

WPF Listview binding with Gridview cell template using EDMX file

Good evening, welcome to WPF programming. I already explained, how to bind WPF listview from string type list also explained binding it with database table using EDMX file. In this article, I will give you an example of cell template of Gridview, which is inside in WPF Listview. You can say, I will update previous WPF listview article. If you want to customize your Gridview cell in WPF Listview control then use cell template.

Note: Before doing this task, read previous

You need to change only XAML file without any changes in code behind code. The previous XAML code is:


<Grid>   

    <ListView Name="listgrid">   
<ListView.View>

<GridView>  

       <GridViewColumn Header="Id" DisplayMemberBinding="{Binding Id}"/>  

       <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Emp_Name}"/>   
</GridView>       
     </ListView.View>     
    </ListView>   

   </Grid>

Now, replace it with below-mentioned code


<Grid>  

     <ListView Name="listgrid">  
<ListView.View>

 <GridView>


           <GridViewColumn Header="Id" DisplayMemberBinding="{Binding Id}"/>   

             <GridViewColumn Header="Name">  

<GridViewColumn.CellTemplate> 

                 <DataTemplate>  

<TextBlock Text="{Binding Emp_Name}" FontWeight="Bold"/>  
</DataTemplate>

</GridViewColumn.CellTemplate> 

           </GridViewColumn>    
</GridView>          
       </ListView.View>     

   </Grid>  

     </ListView>

Now, codes generate the following output:

WPF Listview binding with Gridview cell template using EDMX file

ASP.NET ASP.NET fileupload control

October 22, 2015

ASP.NET fileupload control change border color Programmatically

Each control in tools of visual studio, treat as a class. Property window shows the behavior of their controls also contains some common property, such as back-color, border color etc. Now in this article, we will take a simple example to change the border color with border style of ASP.NET FILEUPLOAD control. I explained, How to use file upload, enable/disable file upload and many more properties.

Source code

 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="fileupload_backcolor.aspx.cs" Inherits="fileupload_backcolor" %>  
 <!DOCTYPE html>  
 <html xmlns="http://www.w3.org/1999/xhtml">  
 <head runat="server">  
   <title></title>  
 </head>  
 <body>  
   <form id="form1" runat="server">  
   <div>  
     Enter Alpha color :  
     <asp:TextBox ID="TextBox1" runat="server" Width="202px"></asp:TextBox>  
     <br />  
     Enter Red Color :&nbsp;&nbsp;  
     <asp:TextBox ID="TextBox2" runat="server" Width="202px"></asp:TextBox>  
     <br />  
     Enter Green Color:  
     <asp:TextBox ID="TextBox3" runat="server" Width="202px"></asp:TextBox>  
     <br />  
     Enter Blue Color&nbsp;&nbsp; :  
     <asp:TextBox ID="TextBox4" runat="server" Width="202px"></asp:TextBox>  
     <br />  
     <br />  
     <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Change Fileupload background color" Width="260px" />  
     <br />  
     <br />  
   </div>  
     <asp:FileUpload ID="FileUpload1" runat="server" Height="51px" Width="311px" />  
   </form>  
 </body>  
 </html>

code behind

 using System;  
 using System.Collections.Generic;  
 using System.Linq;  
 using System.Web;  
 using System.Web.UI;  
 using System.Web.UI.WebControls;  
 public partial class fileupload_backcolor : System.Web.UI.Page  
 {  
   protected void Page_Load(object sender, EventArgs e)  
   {  
   }  
   protected void Button1_Click(object sender, EventArgs e)  
   {  
     int alpha = int.Parse(TextBox1 .Text);  
     int red = int.Parse(TextBox2.Text);  
     int green = int.Parse(TextBox3.Text);  
     int blue = int.Parse(TextBox4.Text);  
     FileUpload1.BorderColor = System.Drawing.Color.FromArgb(alpha, red, green, blue);  
     FileUpload1.BorderStyle = BorderStyle.Solid;  
     FileUpload1.BorderWidth = 2;  
   }  
 }

Code Generates the following output

Programmatically change border color of fileupload control in ASP.NET

In this example, we are taking four textboxes, one button, one file upload control. Using text box we can input the color code value, pass these values in the FromArgb ( ) method as an argument. This example is basically designed for users, who want to change the border color of ASP.NET FILEUPLOAD control at run time.

ASP.NET WEB FORMS

October 22, 2015

ASP.NET Fileupload control enable/disable programmatically

Enable property defines the working mode of asp.net file upload control. It has two boolean value first one is true and second one is false. If you set true for this then control work properly otherwise control doesn't work, I mean to say that fileupload appear on screen but will not work as input control. If you want to set this property during compile time, must add attribute inside the tag. Like

Read Also: ASP.NET FILEUPLOAD CONTROL INSERT IMAGE IN DATABASE

  <asp:FileUpload ID="FileUpload1" runat="server" Enabled="False" />

true is the default value for this. Now take a simple example to change the value at run time.

Source code

 <form id="form1" runat="server">  
  <div>  
     <asp:FileUpload ID="FileUpload1" runat="server" Enabled="False" />  
     <br />  
     <br />  
     <asp:Button ID="Button1" runat="server" Text="Enable/Disable" OnClick="Button1_Click" />  
     <br />  
     <br />  
     <asp:Label ID="Label1" runat="server" Text=""></asp:Label>  
   </div>  
   </form>

Code Behind

 <script runat="server">  
   protected void Button1_Click(object sender, EventArgs e)  
   {  
     if (FileUpload1.Enabled == true)  
     {

Label1.Text = "file upload control is enabled "; 

     
       FileUpload1.Enabled =  false;  
     }  
     else  
     {  
            Label1.Text = "file upload control is disabled ";

       FileUpload1.Enabled = true;  
     }  
   }  
 </script>

Code Generate the following output

Fileupload control disable programmatically in ASP.NET

Fileupload control enable programmatically in ASP.NET

When we press the browse button then we know that it is working or not. Above mentioned snap define this. In first, snap you can see that open file dialog doesn't appear but in second snap its appear, so in second, snap it is working.

MVC MVC 4

October 22, 2015

Default Listing with Insert and Update in MVC 4

MVC 4 provides simple listing procedure through which developer can create CRUD actions for a database table. Awesome thing is developer don’t need to write a single line of code and will complete the task.

We have added new table Category and updated edmx file in earlier article. Now we will create CRUD actions and their views with default MVC 4 structure. We have created empty controller without using any default action but now we will add a controller with all the default actions.

Follow the procedure for creating a controller and in “Add Controller” window name the controller as CategoryController and select the options as selected in the following screenshot and click on Add button:

CategoryController and select the options as selected

This window is prompting for your context class (inherited from DbContext or may be your edmx entities name) file and the model name for which these actions will be created.

After clicking on Add button, it will add a controller with following 5 actions and corresponding views. Those views are not created on the root, but MVC 4 will create those views under new folder with the same name as controller.

Create
Delete
Detail
Edit
Index

Run your project and go to specified controller/Index page, it will load all the categories your database have. Have a look on the below screenshot, with three records each having three action-link i.e. Edit, Details and Delete. Beside these individual action links this table structure also have Create New action on the top through which it will redirect to another view.

So we have saved lot of time that may waste to write the code for all these actions and also for creating their views. This MVC 4 feature is very simple to use and we can create more control for each table. Developer can customize these actions or their views as per their requirements.

Some developer don’t need all these views or maybe they want to enable all these actions on the single page. In next article we will create listing page for our own and write some line of code for table structure.

WPF

October 22, 2015

WPF LISTVIEW BINDING USING EDMX FILE

In previous WPF listview article, I explained, how to bind listview from List of string type. In this article, I will explain you, how to bind listview using EDMX file. We all know about powerful features of WPF listview i.e Gridview. Lets, take an example of it.

  <Grid>  
     <ListView Name="listgrid">  
       <ListView.View>  
         <GridView>  
           <GridViewColumn Header="Id" DisplayMemberBinding="{Binding Id}"/>  
           <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Emp_Name}"/>  
         </GridView>          
       </ListView.View>     
     </ListView>  
   </Grid>

In the mentioned code, Gridview is a view of WPF Listview with two columns that are Id and name. Here, DisplayMemberBinding is the property of GridviewColumn, which is used to bind listview columns from field of model class.

  public partial class MainWindow : Window  
   {  
     public MainWindow()  
     {  
       InitializeComponent();  
       loadlistview();  
     }  
     private void loadlistview()  
     {  
       DatabaseEntities dbe = new DatabaseEntities();  
       listgrid.ItemsSource = dbe.Employees.ToList();  
     }  
   }

Here, DatabaseEntities, context class in EDMX model, also Employees is the public property in DataContext class. Learn How to add EDMX file with database file.
Now, code generate the following output: