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Trimming image using python:                            The following code contains to trim image in equal height and width size. To do this image pixel stored as array of pixel. from PIL import Image import cv2 import numpy as np from matplotlib import pyplot as plt imagename = "pixg.png" img = cv2.imread(imagename, 0) # 0 params, for gray image height, width = img.shape[:2]  # image height and width img1 = Image.fromarray(img) print("height") print(height) print("width") print(width) array=np.array(img) d=np.delete(array,231,0) d=np.delete(d,231,0) d=np.delete(d,231,0) d=np.delete(d,230,0) img2=Image.fromarray(d) plt.imshow(img2,cmap = 'gray') plt.show() print("After Trim") height, width = img2.size #img2.save('trim.png') print("height") print(height) print("width") print(width) Output:  height:234, width:230 After Trim: height:230, width:230 By using cv2 the img read the image from local file. The numpy np c

Gray Scale Image Python:                              Python have option to convert image to Gray. The following code convert normal image to gray scale. import cv2  # Read the main image  img_rgb = cv2.imread('mahindra.png') # Convert it to grayscale  img_gray = cv2.cvtColor(img_rgb, cv2.COLOR_BGR2GRAY)  cv2.imshow('Detected',img_gray)  The package cv2 is used to read image from file.  img_rgb = cv2.imread('mahindra.png'). cv2.cvtColor(img_rgb, cv2.COLOR_BGR2GRAY)  will convert rgb image to gray scale image. cv2.imshow('Detected',img_gray)  will display image.

Dynamic Image.          We can bind image dynamically in asp:image tag. This can be done by using data grid or grid view. Eval function is used to bind data from database. As Table shown below image_url field contain the location of image in server. In this example we use datagrid, the design page sample code below. The asp:image attribute ImageUrl bind value dynamically using Eval function. The Eval function is set with image_url field in image_tb table. img_tb  id  image_name  image_url  1  img1  ~/images/img1.jpg  <asp:DataGrid  ID="datagrid1" runat ="server"      font-names="Times New Roman" font-size="14px" ShowFooter="True" ForeColor="#333399" BorderWidth="1px" BorderColor="Black" BorderStyle="Solid"     AutoGenerateColumns="False"   AllowPaging ="true"  >          <Columns >               <asp:TemplateColumn > <HeaderStyle Horizont

Asp Code to Design Contact Form <div class="contact_form">             <div class="form_row">               <label class="contact"><strong>Name:</strong></label>               <asp:TextBox ID="txt_name" runat ="server" placeholder="Name" BackColor="#CCCCCC" BorderStyle="Solid" ></asp:TextBox>                  <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txt_name"                                     CssClass="field-validation-error" ErrorMessage="The user name field is required." />             </div>             <div class="form_row">               <label class="contact"><strong>Email:</strong></label>               <asp:TextBox ID="txt_email" runat ="server" placeholder="Email

Asp.Net DropDownList                              Using DropDownList user can choose item from the list of item. To DropDownList include the tag  <asp:DropDownList> in Asp page. <asp:DropDownList ID="dd_year" runat ="server" >                  <asp:ListItem  Value ="0">Select</asp:ListItem>                  <asp:ListItem  Value ="1">I</asp:ListItem>                  <asp:ListItem Value="2">II</asp:ListItem>                  <asp:ListItem Value="3" >III</asp:ListItem>                                     </asp:DropDownList> The subtag <asp:ListItem > will add option, the attribute Value add integer value, for our convenience to use in code behind page.  TThe above dropdownlist static. Default Option in DropDownList Asp.Net <asp:RequiredFieldValidator id="rr_year" runat ="server" ForeColor ="red" ErrorMessage ="Select Yea

How to add RadioButton in Asp.Net ?                                   RadioButton allow to choose one  items from list of related items. To add radio button simply include <asp:RadioButton> tag in Asp page. <div>  <asp:RadioButtonList ID="ratiobutton1" runat ="server" >              <asp:ListItem >85 to 100%</asp:ListItem> <asp:ListItem Value ="1">70 to 84%</asp:ListItem>  <asp:ListItem Value ="2">55 to 69%</asp:ListItem> <asp:ListItem Value ="3">30 to 54%</asp:ListItem> <asp:ListItem Value ="4">Below 30%</asp:ListItem>          </asp:RadioButtonList>  <div> The subtag <asp:ListItem > will add radio option, the attribute Value add integer value, for our convenience to use in code behind page.   In code behind page(Vb.Net) ratiobutton1.SelectedItem.ToString() return selected ratio option  string value. ratiobutton1 .SelectedValue() r

Form Validation in Asp.Net.                         The Form validation control are used to control  user to enter valid data. It also give warning to user for invalid data entry. The validation control  validate data entry in client side. It prevent user to store invalid, inappropriate and inconsistency data in database.   ASP.NET Validation Types. RequiredFieldValidator RangeValidator CompareValidator RegularExpressionValidator CustomValidator ValidationSummary RequiredFieldValidator                                   Normally it is used along with the textbox or user input control. It make sure that the textbox is not empty. The user must enter value to textbox otherwise it warn user to enter value to textbox. for example   <asp:TextBox ID="txt_name"    runat ="server" ></asp:TextBox>                    <asp:RequiredFieldValidator ID="rfv_name" runat ="server"  ControlToValidate ="txt_name" ForeColor ="red" E