Assigning A Datasource To A Gridview Dynamically In The Codebehind?

Jul 10, 2010

I am stuck at a task. What I want is, I am creating a table in the database on the fly in the code behind using the below code(in VB).Now my main problem is I want to display this table which is created in step 2 of a wizard, in step 3 using a GRIDVIEW. But as we all know a GridView needs a sqldatasource for values to be displayed, however what I need for achieving this is dynamically assign a datasource to the GridView, but I am not figuring out HOW?

Dim NewTable As String
Dim FullName2 As String = "Dynamic" + "_" + lblCompanyName.Text + "_" + tbCustomerFileName.Text
'Get Row Headers and map to Fields
readerXML.ReadHeaders()

[code].....

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Refresh DataGridView After Assigning New DataSource?

Dec 8, 2009

In a windows form I do have a datagridview. When a user pushes the button, the underlying datasource of the datagridview (a dataview) changes and the new content with new columns is shown. This works fine, only problem is that the header-height differs and that the datagridview does not properly display the smaller headers until I click into the first datarow of the datagridview. Simply using the .refresh()-method of the datagridview after assigning the new datasource does not seem to work.

Here is a little code-snippet showing how I assign a new datasource to the datagridview.
Dim view As DataView = myDataTable.DefaultView
With Me.MyDataGridView
.Columns.Clear()
.AutoSize = True
.DataSource = view
For Each col As DataGridViewColumn In Me.MyDataGridView.Columns
col.ReadOnly = True
Next ...

Preventing Error Popups When Assigning Datasource

Jun 23, 2010

i was wondering is there anyway to stop the error popup messages when i assign a datasource to a DataGridView (and there are errors). i was hoping i could wrap the assigning statement into a Try Catch and handle the errors myself instead of having them popup.

C# - Calling A Codebehind Method From Aspx Page From Gridview?

Nov 23, 2010

How do you call a codebehind/class method from a gridview in an aspx page? Also, I need to pass the value of databound column to that method.

<asp:BoundField DataField="Precision" />
<asp:BoundField DataField="MyNumber" DataFormatString="FormatHelper.Format(MyNumber, Precision)" />

Assigning Text Box Values Dynamically In A Loop?

Feb 10, 2011

I have 20+ text boxes that are all named like:

TxtCustom1
TxtCustom2
TxtCustom3

[code].....

Directly And Dynamically Assigning Values To An Array?

Jun 30, 2010

how to assign a 1-dimensional array value I get from a function directly into an element in a 2-dimensional array. An example would be

Dim Results(7)() as DoubleResults(0) = myFunction() ' returns an array with 5 doubles What is the correct syntax for this, if any? I'm still having a bit of difficulty switching over from Python arrays, which work a lot better, it seems.

Dynamically Assigning Value To Hyperlink For File Downloads?

Feb 27, 2012

MVC3 VB.NET Razor view Application... I have a view that uses a for each loop to display all the available courses. Next to each of these I would like to place a Html link to download that courses class handout file. Problem is I have not found anything on any forums about assigning the value to the hyperlink dynamically since it will vary with every iteration of the for each loop. I have coded the model to hold the file name associated with each class. Below is a snippet from the view..

[Code]...

Assigning Gridview Check Box To A Variable?

Aug 7, 2011

This line of code references a checkbox in a Gridview, how can I assign the value of the check box 1 or -1, I think it is for checked or unchecked, to a variable so that I can run an if statement against it, and change it to True or False?

dt.Rows(row.DataItemIndex)("DisplayString") = (CType((row.Cells(3).Controls(0)), CheckBox)).Checked

Html - Dynamically Created Elements From Codebehind Need To Be Inserted Between Specific Elements

Sep 17, 2010

I created a method and pass the element type, id, and any inner text that instantiates a new html element. The last statement: Me.Controls.Add(element) adds it to the end of the page, but I would like it to be inserted in a specific position (between 2 divs within a form). What I am describing is very similar to this post on SO here, although it was for javascript.

Set A Datasource To A Datagridview Dynamically

Feb 17, 2011

I have an app that has a DataGridView with a few buttons. My intent is to have the DataGridView populate with the data associated with the button clicked. So if you click the States button it'll fill the DataGridView with the DataSet I have created with a link to a SQL table with a list of States.

ASP.Net Button In Codebehind That Calls Codebehind Function

Jul 27, 2010

I'm using Telerik RadControls, in my codebehind I have the following function, a portion of which adds buttons to the footer.

[Code]...

ASP.net: Gridview Datasource Caching ?

Sep 16, 2010

I currently have a control that called MyGridview that inherits Gridview. It has a paging template within it for customized paging options, and I'm at the point where I want to cache the initial datasource for better performance.I haven't done this in a long time, so perhaps there is a different solution these days with the newer frameworks.Before, I simply used a Cache object that was named whatever the gridview was named. I couldn't use the same gridview name through the application though.Is there a best way to have a cache object, or some other object like a session within the control to store those unique datasets for paging and sorting?

Gridview With Different Template Per Datasource?

Sep 3, 2010

I have a gridview that I would like to be able to bind to several sqldatasources, but still use template fields. Each datasource is different and would have different columns so I'm not sure how to go about this. Is it possible to define a set of template fields or overlying template per datasource?

Dynamically Change Datasource Of A Rdlc File?

May 3, 2010

I need to know how to dynamically change the datasource of a rdlc file.

Dynamically Created Datatable Set As Datasource Of Datagridview?

Jul 25, 2011

Dim GridDTB as Datatable[code]...

It is updating only on the table "DT3", which is last create table in the array.

VS 2010 Dynamically Bind Datasource To ReportViewer

Jan 19, 2011

I have a ReportViewer showing a report that is bound to a dataset. The dataset gets its data from a Access database backend. I have a separate form that allows the user to add/update/delete data. My problem is when the user makes changes to the data using the data entry form, the report does not reflect those changes. I have to close the entire program and reopen it before the changes take effect on my report. This piece is used to bound the report to the dataset

[Code]...

Asp.net - Error When Setting The Datasource For A Gridview?

Apr 7, 2009

I have a gridview. Its datasource is set as follows.dtTable is a datable in which the values for the table will be retrieved. But when setting dtTable as datasource I get an error "Object reference not set to an instance of an object". What may be the reason for this?

gridview.Datasource = dtTable
gridview.Databind()

ASP.NET Databind GridView To Datasource Comes Up Empty?

Aug 4, 2011

I have a GridView on an ASP.NET page that I'm trying to bind to an object data source that I've set up to map to a vb object I made which accesses the DB. When I run the page, though, the gridview comes up empty.

The ObjectDataSource is definitely returning data. The paging parameters are making it to the underlying object. All the way until I get to the DataBind() call everything seems fine. But the grid comes up empty. Funny thing is, if I use the method that returns all records in the DB, the grid populates just fine. Only when I try to implement custom paging does display no records. I've tried using the wizards, I've tried diagrammatically setting it up and run time. No matter what I do I can't get paged data to display in the grid.

oDatasource = New ObjectDataSource()
oDatasource.EnablePaging = True
oDatasource.TypeName = "tblMessage"
oDatasource.SelectMethod = "GetTblMessageSubset"

[code]....

Class Instance - Gridview Datasource

Apr 24, 2011

Suppose a click event is fired and a particular gridview datasource is set in the code behind page by retrieving a data table from a business logic class.

So programmatically speaking, what is the main difference between the two set of code listed below.

CODE:

I guess my main question is, what is the purpose of creating a new instance of an object in the above scenario?

Remove Row From Gridview With Datatable Datasource?

Aug 15, 2010

I am using VB.net.

I have a gridview with a datatable datasource.

What is the best option to update the datatable when i delete a row in the gridview and then show the gridview without that row?

Crystal Reports Reportviewer - Set Datasource Dynamically Not Working?

Mar 25, 2010

I'm running CR XI, and accessing .RPT files through a ReportViewer in my ASP.NET pages.I've already got the following code, which is supposed to set the Report Datasource dynamically.

rptSP = New ReportDocument
Dim rptPath As String = Request.QueryString("report")
rptSP.Load(rptPath.ToString, 0)

[code].....

Populate GridView Control From A Linq To SQL DataSource?

Jul 22, 2009

If I used a generic list Class to hold data objects that I am pulling from SQL Server using Linq to sql to populate a datagridview would I need to make any modifications to the datagridview control to accomodate multiple columns or would I need to make any modifications to the generic list class to accomodate the multiple columns in a row that is typical of a record in SQL Server? And one more thing which I believe is the easy part. To bind the list to a datagrid view would I just use the datasource property of the datagridview control.

Show Yes/no In Bool Column Of Gridview Bound To Datasource In Winforms?

Mar 15, 2010

I have a gridview that is bound to a datasource (Windows Forms, VB.NET). One of columns is a property of type boolean, and I want to show "yes/no" in the column instead of 0/1 or "true/false". Is this possible? Can you edit displays of columns that are bound?

Add A Column To A Gridview Dynamically?

Mar 21, 2010

I have a gridview which is created dynamically by adding columns and rows from a database.this is the code which is used to fill the gridview

sqlQuery = "select distinct ID,FullName,Address,[Home Tel],[mobile tel],[work tel],Email,[Birth date],Rate,Notice,Created,Modified,[last cv],Deleted,[q comments],[last typed],Recruiter from [dbo].[vItrisRepository] where email like '%" & email.Text & "%'"
adapter1 =[code]....

now i wanted to add extra column in to the gridview with a name skills in the existing gridview .is this possible?

Dynamically Assign A BackColor To A GridView Row?

Nov 29, 2010

I'm working on an ASP.Net page containing a GridView, which is populated with customer orders returned by a stored procedure. What I'd like to do is dynamically change the backcolor of the GridView rows to indicate priority.

The stored procedure returns an integer indicating the records priority, I think I just need to translate the integer to a color, then make the GridView row display it.

Asp.net - Adding Linkbutton Dynamically To Gridview. Not Firing?

May 8, 2012

I am dynamically adding a link button to every cell in a gridview. Adding the button works however the firing of the even handler doesn't. i need the linkbutton to call a function and pass some data for processing. My code is below. I have found solutions from the site that have gotten me this far.At the moment the gridview loads the cells with buttons in blue. when you click them they go back to plain text and no function is called.

[Code]...

Asp.net - Refer To Footer Value In GridView Created Dynamically ASP VB

Jun 4, 2009

I have a Gridview that I create a dynamic footer wired up to the RowDataBound event.

However there is a 50/50 chance that 3 of the columns will have no data.

I want to be able to dynamically hide the columns with no data if possible.

I have tried doing this in the RowDatabound event by checking if the value is = 0 but that does not work because I think the event is called to early?

Is there anyway to refer to the values in the Footer row after ALL the data has been bound?

Ideally in VB

`Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow Then

[Code].....

C# - Dynamically Populating Column Headers In A Gridview?

Mar 6, 2012

I have a vb.net website with a gridview that currently has exam questions displaying vertically in each row like this:

Name question answer
-----------------------
Joe question1 answer1
Joe question2 answer2

[code]....

But I would like to change it, so that each question is a header, like this:

Name question1 question2 question3
----------------------------------
Joe answer1 answer2 answer3
Jill answer1 answer2 answer3

This makes it more readable since each user is only listed once.I would like to stick with a gridview instead of rewriting all my code.I am actually binding my data to the gridview via some other programmers class. I am using LINQ like this:

Return (From entry In report.FetchAllEntries()
Select questionID = entry.Question.QuestionID,
userID = entry.Session.User.ID,

[code]....

Asp.net - Dynamically Populating A DropDown Template Control In A Gridview?

May 3, 2012

I have a GRIDVIEW with columns, one of which contains a CSV of possible values for the dropdown that must appear on each row.

Private Sub GridViewParameters_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridViewParameters.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow Then[code].....

Depending on whether the type of control is a dropdown, textbox, or check box (feined in the table) it hides or shows the relevant control type. If it is a dropdown it needs to get its values from a CSV in a corresponding column. I have a SP that returns a these in table form if passed the id of the relevant row.How do I get that is from the gridview to pass to the drop down and load it correctly?

Asp.net - Format Dynamically Generated Column Headers Of GridView?

Jun 27, 2012

I have created a Stored Procedure in SQL which produces a pivot table. I've successfully created a GridView in ASP.NET to display this data.

However, some of my column headings are dynamically generated from the data (AutoGenerateColumns=True), and those column headings are just dates, so they will look different almost every time the table is generated.

This all works fine, except that the date format of the column headings is wrong. I know I could change the way SQL produces the dates in its output, but I don't want to do it that way. I want to control it from the web page.

I didn't think this would be difficult - I thought I could just do something along the lines of finding the cells in the header row and changing the datastringformat. The problem is that whether I put my code in the GridView's DataBound or RowDataBound event, the cells in the header row seem to be empty, so I can't reformat them. It's as if the headers get populate some time AFTER the DataBound event, but I don't know when or how to trap it.

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