I have a method I want to use on two gridviews which contain different information, ideally i want to do an if statement, something like
if (GridView.ID = "GridView_ABC") {
// do this
}
else if (GridView.ID = "GridView_2") {
// do this
}
I've created a Gridview in my aspx page, which is referenced in two separate methods in the code-behind file. When I try to run the page, I'm getting a 'does not exist in the current context' error.After a bit of poking on the internet, it seems that I might need to declare the gridview at the class level if it's going to exist in more than one method... problem is, I do that and it disappears from the page altogether.I'm obviously not doing this right - I'm declaring it like this (abridged version):
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I've got a gridview (gvwDepartment) which has within it a template column containing another gridview(gvwEmployees) and a formview(fvwProfile). I want to be able to select the profile of each employee(in fvwProfile) whenever I click on the select button to select him in gvwEmployees. How do I go about that?
View 3 RepliesI' working on an Office Supplies website for a college course I'm doing. I have most of the website created, I'm just working on the shopping cart element of it now.
When the user goes to check out, I have a Gridview displaying the items the user wishes to buy as follows, it contains 3 columns, REF NBR, Product Name and Quantity, when the user clicks on the 'BUY NOW' button I want to take all the reference numbers from the Gridview and search teh database and deduct the Quantity from the number of items in stock.
I know I'll have to have a loop to read through the gridview, but how do I reference the contains of the Gridview REF NBR cell ?
Does anyone know how to do this? I built a backend c# class in asp.net but want to access these same classes without recreating them in silverlight. Is this a possibility?
View 4 RepliesI have an imagebutton control in the column HeaderTemplate of a gridview and want to know how to reference the imagebutton so I can add an attribute to it programmatically. Following is the code for my gridview control:
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I can reference the checkbox control correctly with CheckBox chkbox = GridView1.FindControl("chkSelected") as CheckBox;However, I have tried the following code for the imagebutton but I get the error message Object reference not set to an instance of an object.:
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Or is the OnInit event handler the right place to reference the control?
I have multiple questions about doing gridview in code behind.I used this code to fill my gridview at runtime.
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My questions are:1. How to edit the column headers? When I bind the database to my gridview, obviously, the column headers of the database will be binded. For example "First_Name", I want to edit the column so I can omit the underscore.2. How to edit the column width?
Is there a way to turn this
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First, what I am showing here works fine, and I know how to do this if the nested control comes from the same bound table. I could leave it at that, but I don't like SQL code in my aspx page, and want to move it. I'm keeping it simple here, but I can move it to a data access layer later on..... for now, I want to understand what's going on when the page loads and the nested control is rendered and populated. WHAT I LEARN FROM THIS WILL BENEFIT ME ACROSS THE BOARD - NOT just for this instance!!!
My question is, how to grab the SQL query from the aspx page for the NESTED control and move it to the codebehind. I'd LOVE to also move the Selected Value parameter if possible, but mainly want to get the SQL out of the page. I KNOW HOW TO DO THIS for a GridView or any control, but I DO NOT know how to do it for a NESTED CONTROL from a different table - i.e. WHERE it fires (on GridViewEditing or GridViewUpdating or PageLoad....) so I can put in the SQL where it belongs.... and I'm PRETTY darn SURE this can be done without a 'foreach' loop. For discussion's sake here, imagine
1. DATABASE: simple table with employee_ID, employee_name, employee_city as fields
2. DATABASE: simple table containing all cities (city, cityval)
2. simple GridView that displays these 3 fields in same order ON VIEW
3. Template field for city. On PAGE LOAD, this is a simple label bound to the 'city' field. HOWEVER - On EDIT (with edit button), the field changes to a nested DropDownList that is bound to the 'city' table, NOT to the employee table.
4. Selected value is the current city for employee The PROC you see here in the edit item SQL is actually SELECT * FROM [cities] ORDER BY [city_name]
<asp:GridView ID="grdEmployee" runat="server" AutoGenerateColumns="False"
CssClass="grdE" DataKeyNames="employee_ID"
ShowFooter="True">
<Columns>
<asp:BoundField DataField="employee_ID" HeaderText="ID" ReadOnly="True" />
<asp:TemplateField HeaderText="Employee Name">
<ItemTemplate>
<asp:Label ID="lblEmployeeName" runat="server" Text='<%#Eval("employee_name")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtEmployeeName" runat="server" Text='<%#Eval("employee_name")%>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="City">
<EditItemTemplate>
<asp:DropDownList ID="cboCity" runat="server"
DataSourceID="SqlDataSource1" DataTextField="city" DataValueField="cityval"
SelectedValue='<%# Bind("employee_city") %>'>
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="Data Source=XXXXXXXXXXXX;Initial Catalog=xxxxxxx;Integrated Security=True"
ProviderName="System.Data.SqlClient"
SelectCommand="QUERY_CITY" SelectCommandType="StoredProcedure"></asp:SqlDataSource>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblEmployeeCity" runat="server" Text='<%# Bind("employee_city") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
ALL I want to do is move the SQL Query in the EDIT template above to the code behind. I just don't know WHERE or WHEN in the code this fires and how to handle it when the table is different from the original GridView table. AND the cboCity.SelectedValue, if possible.
I've been trying to accomplish this for days without joy. I need to update a specific cell in a gridview with some static text when a button click that is outside the gridview. The cell i need to update is a template field.
View 10 Repliesis it possible to have a button that points to a method you have defined in codebehind, that passes in a record from the row as a parameter? for example, id.something like:
<asp:CommandField ButtonType="Image" EditImageUrl="/editbutton.jpg" ShowEditButton="True" OnClick="editRow(int id)"/>
it wouldnt necessarily 'edit' this row. i'd like it to instead load an editable grid corresponding to the id passed.
a Gridview contain itemtemplate(using code behind) and
Textbox with random id
how to access the the textbox id in code behind
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This is my gridview with an item template, I have NO boundColumns.TO get data to codebehind I use Eval(" <Field name >"), but this returns something to a control. Not making data available for codebehind code for general use.
Question: As I have no boundcolumns I dont know how to get data to codebehind to to use as I wish??
how can i set DateFormatString inside GridView column in codebehind page?
View 6 RepliesI have a DataList with controls in the Header that are used to filter the DataList. Everything works correctly until I try and edit the filtered DataList. Having set the EditItemIndex, I then need to read the values from the header filter controls to ensure the Bind returns the same collection of rows. I am calling a function that should return the Header DataListItem so I can get the filter values if set. The problem is the DataList Item collection does not seem to have the HeaderItems in it.
Ian HTML
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I have a dropdownlistbox which references a specific column for a table in my database. After I select the proper id from the dropdownlistbox, I should press the submit button to see the name of the customer populated in a text field who references the id number for the dropdownlistbox. However, I am having trouble referencing a different column within the table. I can only view the selected value from the dropdownlistbox in the text box.
protected void EmployeeIDNumberListBox_SelectedIndexChanged(object sender, EventArgs e)
I have a Data list, inside that i have a repeater, inside the repeater i have a panel.hat i want to do is reference my panel (Panel1) so that i can change the visible properties when a link button is clicked. However as this is inside a dynamic control i am a bit lost in how to reference it! This is my code
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I would like to know how to reference the asp.net text field which is in the EditItemTemplate tag of a DetailsView control to load the JQuery DatePicker when clicked in the JQuery script. Following are the code that I have, but it throws the error :
The name 'txtDateOfBirth' does not exist in the current context
JQuery at the header of the page:
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I have a formview that runs of an SQLDS, very simple stuff. Inside that form i have various fields, one of them is a credit field, one of them is a debit field. Now i have put a radio button list with two radio buttons (credit and debit). What i want to do is when the "credit" radio button is enabled i want the "credit" text box to be enabled and visa versa.
I know how to reference an object inside a formview, but i am confused, do i reference the radio button list and then the list items inside it or?
I am using a CustomValidator to compare two textbox control values in the form view. These values are not required but must be compared if a valuue is entered. The same two controls are defined in both Edit Item Template and Insert Item Template. The formview default mode is Edit.
The javascipt for the custom validator works when in Edit mode. However, when the form view is Insert, the javascript throws an error of NullReferenceException. how I can adjust my code so that the client-side javascript works for both Edit and Insert mode?
The form view is in a content page. The script is in the Head content placeholder
<script type="text/javascript">
<!--
function cvSecondaryEmail_Validate(source, args)
{
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i saw this post on[URL] so the problem is .... if there is a datasource in some editeitem template in grid view .... it won't be accessible from out of the edit-item field.....
here's my code...
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that i have here is ID-column which contains a linqdatasource taking a where parameter from a dropdownlist and they are both in the same edit-template field.
and i have in another column (CourseTypeID-column ... edit-item template) a dropdownlist ..... now this dropdownlist i want to bind it to the linqdatasource exists in the ID-column (edit-item template)..... is that possible in the designer (or from) not code behind ..... and how ????
I have a gridview that has a hyperlink field in one of the columns. My question is how do I can I reference the the hyperlink's datatextfield when I click on the hyperlink? The field is a PDF that is stored in the data base and I need the datatextfield to reference the record in the db.
View 5 RepliesI'm making the switch from vb.net to c#, and am just trying to bind some data from a reader in my c # codebehind, but no matter what, the gridview always skips the first row returned from my stored procedure. What am I doing wrong?
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I know I can use a code like this:
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To create a DIV in my body but how do I then add innerHTML to this control? Or can I directly add an Label to the newly created control and set tag ones text?
search for a item, display the results in a datagrid, have a LinkButton (per item in the datagrid) to show a popup modal and insert this data to a new table. I have the search, the datagrid, and popup modal all working. I need help with the add button in the popup modal (which insert into a new table in the db). In my datagrid im using DataFields - how would I get access to this in the codebehind so I dont have to re-query the db again for the ID that i'm trying to insert?
View 5 Replies