Using TemplateFields in the GridView Control. This method can be added to the ASP.NET page's. Of course, DataBinder.Eval continues to be supported in ASP.NET 2.0 pages, so you use that instead for scenarios where the simplified Eval syntax is not supported. VB Validation in a GridView Edit Template. Home / ASP.NET Forums / General ASP.NET / Web Forms / Calling Codebehind Function in GridView. Calling Codebehind Function in GridView ItemTemplate Using Eval(). Calling Codebehind Function in GridView ItemTemplate. Using Template. Fields in the Grid. View Control (C#)To provide flexibility, the Grid. View offers the Template. Field, which renders using a template. A template can include a mix of static HTML, Web controls, and databinding syntax. In this tutorial we'll examine how to use the Template. Field to achieve a greater degree of customization with the Grid. View control. Introduction. The Grid. View is composed of a set of fields that indicate what properties from the Data. Source are to be included in the rendered output along with how the data will be displayed. The simplest field type is the Bound. Field, which displays a data value as text. Other field types display the data using alternate HTML elements. The Check. Box. Field, for example, renders as a checkbox whose checked state depends on the value of a specified data field; the Image. Field renders an image whose image source is based upon a specified data field. Hyperlinks and buttons whose state depends on an underlying data field value can be rendered using the Hyper. Link. Field and Button. Field field types. While the Check. Box. Field, Image. Field, Hyper. Link. Field, and Button. Field field types allow for an alternate view of the data, they still are fairly limited with respect to formatting. A Check. Box. Field can only display a single checkbox, whereas an Image. Field can only display a single image. What if a particular field needs to display some text, a checkbox, and an image, all based upon different data field values? Or what if we wanted to display the data using a Web control other than the Check. Box, Image, Hyper. Link, or Button? Furthermore, the Bound. Field limits its display to a single data field. What if we wanted to show two or more data field values in a single Grid. View column? To accommodate this level of flexibility the Grid. View offers the Template. Field, which renders using a template. A template can include a mix of static HTML, Web controls, and databinding syntax. Furthermore, the Template. Field has a variety of templates that can be used to customize the rendering for different situations. For example, the Item. Template is used by default to render the cell for each row, but the Edit. Item. Template template can be used to customize the interface when editing data. In this tutorial we'll examine how to use the Template. Field to achieve a greater degree of customization with the Grid. View control. In the preceding tutorial we saw how to customize the formatting based on the underlying data using the Data. Bound and Row. Data. GridView TemplateField in asp.net - Part 21. Please watch part 20 of asp.net gridview tutorial before proceeding. Finally click on 'End Template Editing' from GridView Tasks pane. Select, Update, and Delete Data in a ASP.NET GridView Control. TextBox ID ='txtName' runat ='server' Text =' <% #Eval('name') %> '> </ asp. Use Multiple Eval Fields in ASP.Net GridView ItemTemplate; Use Multiple Eval Fields in ASP.Net GridView ItemTemplate. Answered Active Solved. This site is started with intent to serve the ASP.Net Community by providing. Bound event handlers. Another way to customize the formatting based on the underlying data is by calling formatting methods from within a template. We'll look at this technique in this tutorial as well. For this tutorial we will use Template. Fields to customize the appearance of a list of employees. Specifically, we'll list all of the employees, but will display the employee's first and last names in one column, their hire date in a Calendar control, and a status column that indicates how many days they've been employed at the company. Step 1: Binding the Data to the Grid. View. In reporting scenarios where you need to use Template. Fields to customize the appearance, I find it easiest to start by creating a Grid. View control that contains just Bound. Fields first and then to add new Template. Fields or convert the existing Bound. Fields to Template. Fields as needed. Therefore, let's start this tutorial by adding a Grid. View to the page through the Designer and binding it to an Object. Data. Source that returns the list of employees. These steps will create a Grid. View with Bound. Fields for each of the employee fields. Open the Grid. View. Template. Field. aspx page and drag a Grid. View from the Toolbox onto the Designer. From the Grid. View's smart tag choose to add a new Object. Data. Source control that invokes the Employees. BLL class's Get. Employees() method. Binding the Grid. View in this manner will automatically add a Bound. Field for each of the employee properties: Employee. ID, Last. Name, First. Name, Title, Hire. Date, Reports. To, and Country. For this report let's not bother with displaying the Employee. ID, Reports. To, or Country properties. To remove these Bound. Fields you can: Use the Fields dialog box click on the Edit Columns link from the Grid. View's smart tag to bring up this dialog box. Next, select the Bound. Fields from the lower left list and click the red X button to remove the Bound. Field. Edit the Grid. View's declarative syntax by hand from the Source view, delete the < asp: Bound. Field> element for the Bound. Field you wish to remove. After you have removed the Employee. ID, Reports. To, and Country Bound. Fields, your Grid. View's markup should look like: < asp: Grid. View ID=. At this point you should see a table with a record for each employee and four columns: one for the employee's last name, one for their first name, one for their title, and one for their hire date. Step 2: Displaying the First and Last Names in a Single Column. Currently, each employee's first and last names are displayed in a separate column. It might be nice to combine them into a single column instead. To accomplish this we need to use a Template. Field. We can either add a new Template. Field, add to it the needed markup and databinding syntax, and then delete the First. Name and Last. Name Bound. Fields, or we can convert the First. Name Bound. Field into a Template. Field, edit the Template. Field to include the Last. Name value, and then remove the Last. Name Bound. Field. Both approaches net the same result, but personally I like converting Bound. Fields to Template. Fields when possible because the conversion automatically adds an Item. Template and Edit. Item. Template with Web controls and databinding syntax to mimic the appearance and functionality of the Bound. Field. The benefit is that we'll need to do less work with the Template. Field as the conversion process will have performed some of the work for us. To convert an existing Bound. Field into a Template. Field, click on the Edit Columns link from the Grid. View's smart tag, bringing up the Fields dialog box. Select the Bound. Field to convert from the list in the lower left corner and then click the . Go ahead and convert the First. Name Bound. Field into a Template. Field. After this change there's no perceptive difference in the Designer. This is because converting the Bound. Field into a Template. Field creates a Template. Field that maintains the look and feel of the Bound. Field. Despite there being no visual difference at this point in the Designer, this conversion process has replaced the Bound. Field's declarative syntax - < asp: Bound. Field Data. Field=. The databinding syntax - < %# Bind(. This can be accomplished either by hand or through the Designer. To do it by hand, simply add the appropriate declarative syntax to the Item. Template: < asp: Template. Field Header. Text=. This will display the Grid. View's template editing interface. In this interface's smart tag is a list of the templates in the Grid. View. Since we only have one Template. Field at this point, the only templates listed in the drop- down list are those templates for the First. Name Template. Field along with the Empty. Data. Template and Pager. Template. The Empty. Data. Template template, if specified, is used to render the Grid. View's output if there are no results in the data bound to the Grid. View; the Pager. Template, if specified, is used to render the paging interface for a Grid. View that supports paging. To also display the Last. Name in the First. Name Template. Field drag the Label control from the Toolbox into the First. Name Template. Field's Item. Template in the Grid. View's template editing interface. At this point the Label Web control added to the Template. Field has its Text property set to . We need to change this so that this property is bound to the value of the Last. Name data field instead. From here you can select the property to participate in databinding from the list on the left and choose the field to bind the data to from the drop- down list on the right. Choose the Text property from the left and the Last. Name field from the right and click OK. Note: The Data. Bindings dialog box allows you to indicate whether to perform two- way databinding. If you leave this unchecked, the databinding syntax < %# Eval(. Either approach is fine for this tutorial. Two- way databinding becomes important when inserting and editing data. For simply displaying data, however, either approach will work equally well. We'll discuss two- way databinding in detail in future tutorials. Take a moment to view this page through a browser. As you can see, the Grid. View still includes four columns; however, the First. Name column now lists both the First. Name and Last. Name data field values. To complete this first step, remove the Last. Name Bound. Field and rename the First. Name Template. Field's Header. Text property to . After these changes the Grid. View's declarative markup should look like the following: < asp: Grid. View ID=. For certain scenarios, however, the data is best expressed using a particular Web control instead of just text. Such customization of the display of data is possible with Template. Fields. For example, rather than display the employee's hire date as text, we could show a calendar (using the Calendar control) with their hire date highlighted. To accomplish this, start by converting the Hired. Date Bound. Field into a Template. Field. Simply go to the Grid. View's smart tag and click the Edit Columns link, bringing up the Fields dialog box. Select the Hired. Date Bound. Field and click . From the Designer, select Edit Templates from the Grid. View's smart tag and choose the Hire. Date Template. Field's Item. Template from the drop- down list. Next, delete the Label control and drag a Calendar control from the Toolbox into the template editing interface. At this point each row in the Grid. View will contain a Calendar control in its Hired.
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January 2017
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