Forms Data Controls :: Accessing Textbox Elements In GridView
Jul 12, 2010
I have a Gridview X in which there are 6 columns(5 template columns that are text boxes and 1 bound field). The user has the option of changing the value in the text boxes annd saving them. There is one more GridView Y that displays DB values(all 6 columns are bound fields). Initially X will show the values that being shown in Y, and when user changes the values in Y,he should be able to save it. If we are trying this using OnTextChanged event of asp:Textbox, there is a postback everytime the user makes a change in any of the textboxes. Instead i want it such a way that all the changed values should get concatenated together and should be sent to the DB.
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Oct 12, 2010
I have a gridview which has autogenerate Columns Property "TRUE", and i'm dynamically binding this gridview with columns with sql database dataset. there is no data in sql but i am successful in showing blank gridview on form, now i want textboxes in gridview attached with each column, so i wrote code in RowDataBound which generates textbox automatically and assigns ID to each textbox, nw i want to insert that data from textbox to database but i'm not getting text which is entered in those textboxes, as i am accessing that textboxes using findcontrol and passing the id like gridview1_ctl03_text0. but i''m not getting any value from textbox?
In short i want to access auto generated textbox (with out any id predefined ) values from footer of gridview
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May 17, 2010
I've been searching all day for a solution to this, but nothing has worked.
Here's my scenario: I'm binding the gridview to a datatable. One of the columns is a textbox that will accept user input.
When a "submit" button is clicked, I need to loop through all the rows, get the textbox's text, and add them all together. Simple, right?
I've tried the following (this is on the "submit" button's click event):
[Code]....
The itemtemplate looks like this:
[Code]....
The txtDays.Text property is ALWAYS empty. UNLESS I assign it a value w/in the control. But then it's ALWAYS that value. I need to get the value of what the user enters.
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Jan 25, 2010
I've been playing with a certain detailsview for most of last week. This particular control is located within a panel that is hidden until a user clicks a linkbutton on a gridview. Then the panel's visible property is set to true and the detailsview is populated based on the commandargument passed through the link button. What I've discovered is that with each postback, the datakey or control parameter, still not sure which or if both, is lost. I've discovered a lot about ViewState and how controls work and am a bit surprised that something as common as using a detailsview within a gridview wouldn't be handled better than it is now. I have been able to get the proper information to build a correct select statement when the user decides to edit a record. I am now working on an update statement, but for some reason while I have the right key to update the right record, I am unable to access the user-generated data that was entered in the details view.
For instance, I select record with ID of 1 in the gridview. It pulls up the detailsview and I can view it. I then click edit. The correct record is still there. (It was previously going to default). When I enter new text in a textbox and click update, the app still knows I am working with record #1 but doesn't seem to be able to find the textbox control. I have currently hard-coded a value into the field just to see if I could actually get the record to update and it did. I am using an OnInit to cause the sub to run and think this might be the problem. However, I have been unable to find a better way around this.
Here is the sub that executes on the OnInit() of the detailsview:
Protected Sub notes_binding()
If notesDetail.CurrentMode = DetailsViewMode.Edit Then
sqlNotesUpdate.UpdateCommand = "UPDATE [Oilchange_Notes] SET [notes] = '" & CType(notesDetail.FindControl("notes"), Textbox).Text & "' WHERE [vehicle_id] = " & Session("unitNumVal")
sqlNotesUpdate.UpdateCommandType = SqlDataSourceCommandType.Text
sqlNotesUpdate.Update()
End If
sqlNotesUpdate.SelectCommand = "SELECT * FROM [Oilchange_Notes] WHERE ([vehicle_id] = " & Session("unitNumVal") & ")"
End Sub
And this is the error I get: Object reference not set to an instance of an object. If I'm correct about why it's not pulling the actual value or even acknowledging the control exists and is actually 'notes' (it is), then at would point would be the best to place this code?
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May 8, 2010
I have a page where i am creating a number of <span> elements using clientside code.
I am creating the elements using jquery like this
[Code]....
But this returns a null object everytime. I have tried this code on a span that is on the page at the beginning and it works so i guess its something to do with how im creating the control dynamically.
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Mar 3, 2010
I am creating a WebUserControl in ASP.net and want to be able to access elements of that control later. When I access them though I am trying to access them together. For example, adding a CheckBox and a table to a control and then finding the CheckBox, checking whether it has been ticked and if it has been ticked, get the values from the TextBoxes.
I currently have everything loading on the page from the custom controls, but when iterating through the controls on the page, there doesn't appear to be a control of my WebUserControl type. All of the controls are there on the page, but they exist as seperate ASP.net controls.
Am I thinking about this wrong? Is there a better way to do this?
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Mar 26, 2016
I am trying to get access the elements inside gridview by validating this requirement: if checkbox is checked then 1) Role must be selected from the dropdown 2) And the Title textbook must be filled. I am getting this error now:
Error: Sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object.
JS
<script type="text/javascript">
function validate() {
var flag = true;
var gridView = document.getElementById('<%= gvTest.ClientID %>');
for (var i = 1; i < gridView.rows.length; i++) {
[Code] ......
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Mar 11, 2010
I have the following code for my page:
[Code]....
And the following .cs file associated with it:
[Code]....
I would like to be able to do the following in the .cs file for this page:
#1. Initially "Submit News" is disabled. The admin must click "Preview News" which will update the newslabel temporarily and also enable the "Submit News" button.
#2. When the "Submit News" button is clicked, the news.txt file should be opened and whatever content is currently in the newslabel.Text will be written to news.txt. The news will then be updated for anyone to see.
Right now, if I try to do "submitnews.Enabled = false;" is does not let me because it thinks that submitnews is not in the current context. Basically I need to know how to access elements that are within a <asp:LoginView> area.
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Feb 10, 2010
I have GridView control with a checkbox in one of the columns. When I click a button to submit, I want to see if the checkbox is selected, but when I do, it only gets "Yes" for Label but false fo Checked. I know I am accessing the column because I get the Label. Wha tam I missing?
<asp:TemplateField HeaderText="OverRide">
<ItemTemplate>
<asp:CheckBox ID="OverRide" runat="server" Text="Yes" />
</ItemTemplate>
</asp:TemplateField>
//Code Behind
//Where i = the row
CheckBox cb2 = ( CheckBox )GridView2.Rows[j].Cells[7].FindControl("OverRide");
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Jan 11, 2010
From what I understand within the Gridview Object you can have many datakeynames.
I have the field like this DataKeyNames = "id1, id2"
However, i don't know how to access the DataKeyNames individualy. For example. How do you access the first ID for the for a given row or the 2nd ID for a given row????
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Apr 20, 2010
I currentlly am trying to get a bit value from a specific cell, i can get a text value from text cell but i cant seem to fiqure out how to access the bit value. This is on a dgvRowCommand event so im using datakeys to access the row and a column index for the coloumn like so.
lblFolderRead.Text = dgvCollabFolder.Rows[currentIndex].Cells[1].Text;
This works if im trying to get a text value but obviously a bit value isnt text and thus does not return anything, How would i access a bit value in the manner above, or if it is not possible that way what other alterntives are there?
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Jun 3, 2010
Accessing GridView Element of specific row?
GridView1.DataSource = newDs;
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Aug 30, 2010
I have taken checkbox inside gridview. And also one linkbutton. When i click on linkbutton to check whether this checkbox is checked or not.
I have some code snippest.
[Code]....
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Mar 5, 2011
In a page, there is a lable called lblTotal and a gridview with 3 columns; Name, Percentage and Amount.
Name and Percent are values that come from a database. Next I need the caluclate the Amount field. The Amount field should be set by taking the Percentage column value in each row, against the value in lblTotal and displayed in the Amount column
So for example
If the value in lblTotal is £200 and the dataset in my gridview looks like this...
Name......Percent......Amount
John......20%..........
Dave......60%..........
Mark......20%..........
Then the result would be this
Name......Percent......Amount
John......20%..........£40
Dave......60%..........£120
Mark......20%..........£40
So I guess I would need to do this using OnRowCreated and do a find control maybe?
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Oct 2, 2010
In my application Iam using GridView, in this there are fields (Quantity, Price, Amount) the user can enter Quantity Field value which is a template field (textbox). Iam calculating Amount(Quantity * Price) using Javascript and assigning to the Amount Column cells as below
Gridviewcell.innerText=Quanity * price.
and when user clicks on the Save button I want to add these details of Gridview to the database.
when I try to access the values of the gridview using below code
For i=0 to GridView.rows.count-1
GridView.Rows(i).Cells(2).toString ( for Example)
Next i
It is not displaying the changed value instead it is displaying the default value before calculating the amount.
Before implementing the Javascript part, I had done this in the code behind and it was working fine... Now I just dont want the page to get load so I used javascript.
able to access the value of Gridview cells which are assigned using Javascript.
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Jun 27, 2010
I have the following html in my gridview in an item template :
<a
href="<%#Container.DataItem("ReciprocalURL")%>"
target="_blank"
title='<%#Container.DataItem("ReciprocalURL")%>'
id="recip">
So I thought that you could use id="name" and access this just like an ASP control such as <ASP:Checkbox
or <ASP:Label etc. My code continues to caugh and state object not set to an instance of an object when I uncheck my checkbox
Line 741: ElseIf Not Me.CheckBox1.Checked Then
Line 742: Dim row As GridViewRow = gvLink.SelectedRow
Line 743: Dim recip As HtmlAnchor = TryCast(row.FindControl("recip"), HtmlAnchor)
Line 744: Response.Write(recip)
Line 745:
[Code]....
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May 28, 2010
Is there a way to access the updated text property of a TextBox which is inside a GridView cell when a Wizard controls next or previous buttons are clicked? I have a requirement to not use the edit and/or update buttons on the GridView row. Therefore, I am trying to figure out a way of grabbing the updated values of each TextBox of the GridView on the PostBack. Furthermore, these controls (i.e. Wizard and GridView) are within an AJAX UserControl.
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Feb 25, 2011
{"d":{"key1":"value1",2":"value2"}}s there any way of accessing the keys and values (in javascript) in this array without knowing what the keys are?The reason my json is structured like this is that the webmethod that I'm calling via jquery is returning a dictionary. If it's impossible to work with the above, what do I need to change about the way I'm returning the data?
Public Function Foo(ByVal Input As String) As Dictionary(Of String, String)
Dim Results As New Dictionary(Of String, String)
'code that does stuff
Results.Add(key,value)
Return Results
End Function
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Feb 1, 2010
I am using a list of objects as a datasource and passing the object into a user control. I use the code outlined below
[code]...
When I try to access the object this way, it's null.
Funny thing, I can access the user control and all the control data in the user control, but the object (both in the gridview and passed to the user control) are null.
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Dec 15, 2010
I have a GridView (it could just as easily be a ListView if the latter is easier).
I have a Button completely outside of the GridView.
I want to access the cell values in the GridView from the Click event handler of the Button.
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Nov 19, 2010
Iam using a radio button in a Gridview. I want to check whether it is checked or not. If it is checked i want to pass one value or if it is unchecked i want to pass another value. But even when i checked the radio button, it is still showing unchecked in the Debugger. How to check whether it is checked or not. Following is the code iam using:
[Code]....
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May 8, 2010
How To Get gridview Footer Textbox value in asp.net outside textbox on blur ....
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Sep 28, 2010
I have a gridview with a template field column. In the edittemplate of that column i have a textbox. In the next column of the gridview i have a button. When i click the button i need to find the value of the before mentioned textbox. I do it like this:
gridview1.selectedrow.findcontrol("textbox1"). This sometimes work just fine and without a problem but sometimes it seems it can't find that control and throws a null reference object. The error it's random like i said, sometimes just work and other just don't work...
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Nov 25, 2010
I have a gridview control.
Below is the code...
<asp:GridView ID="gvEdit" EmptyDataText="No data found" runat="server" BackColor="White"
BorderColor="#999999" BorderStyle="Solid" BorderWidth="1px"
CellPadding="3" CssClass="Base"
ForeColor="Black" PageSize="15" AllowPaging="false"
[Code].....
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Feb 4, 2010
I have been trying to achieve the following:
1-Allow the user to change the quantity in a textbox i.e // "txtQuantity"
2-capture the newly entered quantity i.e //int integerNewQuantity= int.Parse(textNewQuantity.Text);
3-update the database using the newly entered quantity i.e. //UpdateItem(data,integerNewQuantity)
Problem:1-I have not been able to capture the text i.e. the newly entered quantity i.e. the value entered in the text box "txtQuantity"
2-Hence the database is updated using the existing value and NOT the new value unless I make a constant assignment as below:
textNewQuantity.Text = "2"; When tested the assignment of any number correctly updates the database. see the c# code:
C# code: Version.1
protected void btnUpdate_Click(object sender, EventArgs e)
{
txtItemDescription.Text = txtItemDescription.Text + "from btnUpdate talking.."; [code]....
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