I'm unable to get the check box value from dynamically created gridview in vs2010. I'm using the ITemplat class to create the templat column.
View 2 Repliesi generated dynamic checkbox n placed it in table cell( <td runat='server' id="trial"></td>) ,
i am not able to check whether check is checked when i click a button.
i recieve exeception :System.NullReferenceException was unhandled by user code
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I am creating a gridview that inherits from a webpart. Code runs with out the error but just shows a blank page. I am looking for an example of the page directive, register and user control tags. I am not sure what other steps I need to take to show the gridview on the aspx page. Here is the code:
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I have a page that I am creating 5 separate GridViews on, depending on the button the user clicks, a different GridView will show up. On a few of the GridView's there is a need for paging, so in the CodeBehind I did the following
billingGridView.ID = "BillingGridView"
I have created one user control in which I have taken a gridview. Columns of this gridview are getting generated dynamically. (i.e. I read Column name from Xml file) But now I want my first coloumn of this gridview as a checkbox field.
I am giving my code snippet for reference.
This is function to create Grid.
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I want to create a gridview with the first column being the Job Number and then a variable number of subsequent column which are fordates. This grid is a data entry for hours worked on a particular date for a particular job. I wrote the code to get the correct number of columns and column headers but I am having trouble getting textboxes into the grid cells.
public partial class _Default : System.Web.UI.Page
{
#region constants
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I have a menu. I use the menu's menuitemclick event to create a gridview (several actually) that is then added to a panel for display.The gridview paints perfectly until I try to add paging.I have successfully used paging and sorting declaratively for years, but this is my first attempt to do everything in code.When the gridview tries to databind, it throws an error:
[NullReferenceException: Object reference not set to an instance of an object.]
System.Web.UI.WebControls.GridView.get_StateFormatter() +25
System.Web.UI.WebControls.GridView.BuildCallbackArgument(Int32 pageIndex) +56
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In design time I created a Gridview and a delete button in a page test.aspx:
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The program stopped at statement "if ((row.Cells[COL_INDEX_SELECTED].Controls[0] as CheckBox).Checked)",
because it cannot find the checkbox created before.
I tried to shift all the code in Page_Load to Page_Init, but the ticked checkboxes are still lost.
I could find the ticked checkboxes names in its request object parameters(this.Request.Params.AllKey) if I setup a breakpoint on the error statement.
Does anyone konw what's happening and how to retrieve the selected rows?
I am having Gridview ie : inside i have placeholder, So on Gridview_RowDataBound - according the Specific Condition getting from DB then - i am Creating the Dropdownlist dynamically here and assign Datasource. so up to this its ok. My Problem When the user Select any value on the Dropdownlist on Gridview ,
i have one button outside the Gridview so if i click the button i am want to get the dropdownlist selectedValue so on the Button_Click Event
i used foreach row in the Gridview.. but i do no how to get the value. as the Dropdownlist is create dynamically on Gridview_RowDatabound event. but here what i have to write to get the dropdownlist?
I am dynamically creating my grid view as:
HyperLinkColum hlc = new HyperLinkColum();
hlc.Datatext.DataTextField = "PK";
myGridView.Colums.Add(hlc);
I wanted to call a page say "test.aspx" and to send the primary key of the relevant row to the "test.aspx" page and then how to retrieve this values in the "test.aspx" page
I am dynamically generating the Row in GridView and saving the data in database using StringCollection. Instead of using StringCollection i want to pass the data(user entered data) to local variable , eg:
string name = txtFName; and so on. but it wont work for dynamically created rows.
So if you knw how to assign the user provided data in the local variable like above i have show.
The code for inserting the records for dynamic created rows in grid view via StringCollection is below
protected void btnSave_Click(object sender, EventArgs e)
{
int rowIndex = 0;
StringCollection sc = new StringCollection();
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i created a gridview with two columns and 8 rows dynamically. All the rows are empty and editable at runtime. I am giving column names for this grid from some other .aspx page by passing column names using querystring.Because i am using this grid for three different pairs of column names. i would like to know how to apply Required Field Validator, Regular Expression Validator and Range Validator on Gridview textboxes. So that by using those validators i want to validate user inputs. And i would also like to know how to add rows at runtime for this grid.
I am using ASP.net 2.0 and C#.net for this.(Visual Studio 2005)
The code i am using to create gridview is below.
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I have a grid view that is dynamically created.In which every cell in the girdview has a 2 textbox (cTxtboxQty,ctxtWorkOrder) and 2 label.
When user click on the cell, a pop up come out and user are able to change the text inside the cell and click save.After that the pop up close and changed data immediately reflected on the screen.
My problem is:
After my data are changed and updated to database on the pop up page and having it post back to the parent page , my dynamically created textbox in gridview retain old value even new value has been assigned to it.
This sound very weird but i have no idea how to solve this.
My client side code is as below :
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I have tested many times and find out that it might be the page hold the old value in memory, so that even we have updated the textbox value, after postback, it still keep and show the old value?
I need to create a TemplateField column dynamically , which will contain dropdowlist controls. I've been using this
example to create my first dynamic columns and for the last column, the one that contains dropdowlist controls, I've written this class:
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But what I don't know is, where should I populate the dropdownlist control?
I have a dynamically created address user control (on a customer administration screen) that is created through the use of a place holder. A customer can have multiple addresses, so they dynamically dropped onto the page.
I have got this far, but now I need to be able to save the updated addresses for the customer but I can't get any event to fire on the user controls. When I check to see run plhAddress.HasControls() it returns false?
The way I am generating the user controls is as follows.. private UserControl LoadControl(string UserControlPath, params object[] constructorParameters)
I have created dynamic gridview with textbox
here is the link:
[URL]
but whenever i created new row i have lost focus on textbox. Instead of focus on new row (first column) cursor focusing on somewhere else.
how i can focus on textbox in new row.
i have followed this article and created dynamic rows in gridview on button click: URL....Now i want to save the dynamically created rows data in database/
View 1 RepliesSuppsoe that a certain dynamic property of a ViewBag object is optional. How can I check whether it has been created or not?
My first reaction is to check for null value.
Code:
@if (ViewBag.OptProp != null) {...}
But then how to handle the case when the property has been actually created, but the value assigned to it is null ?
How do I check if an object has a property in JavaScript?. Except mine is about .NET .
how to check if a dynamically created control has posted back?The below code is not working.
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I have created some imagebuttons dyanmically on page_Init. But the above code always returns null. Why is that? How can I check If an image button has posted back?
Note: I am able to handle the click events of those imagebuttons.
grid:
<asp:TemplateField HeaderText="Outdoor Hours" ItemStyle-HorizontalAlign="Right">
<ItemTemplate>
<asp:Label runat="server" ID="lblOutdoorHours" Text='<%# calculateOutdoorHours(Eval("CheckOut")) %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
Function:
protected string calculateOutdoorHours(object CheckOut) {
for (int i = 0; i < grdAttendance.Columns.Count; i++) {
string nextCheckIn = grdAttendance.Rows[i].Columns[1].Text;
TimeSpan duration = DateTime.Parse(nextCheckIn.ToString()).Subtract(DateTime.Parse(CheckOut.ToString()));
return duration.ToString();
}
}
* i binded dropdown value from database in gridview
* then display the value in next column based on selecting dropdown value
* when i click add new row button . could not bind the dropdown value.
below are my code
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<contenttemplate> <asp:Label ID="Label1" runat="server" Text="2"></asp:Label>
<asp:gridview ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="RowNumber" HeaderText="Row Number" />
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i have a WSS 3.0 Webpart that contains an UpdatePanel with a customized SPGridView. I want to provide instant filtering of data by adding a textbox below the column header when the column shall be filterable. There is a jQuery based solution for this on the net, but it's totally client side and doesn't work with paging, so i tried it on my own.
In the CreateChildControls of my SPGridViewExt class i have :
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I've also overridden the DoFilterPostBackEventProcessing method to create a "[ColumnName] LIKE '%[textbox.value]%'" filterExpression for my datasource which also creates the LIKEFILTER_COLUMN and LIKEFILTER_VALUE ViewState Items so i can identify the textbox that should refocus on after the postback. The filtering itself works great, but whatever i try, i am not able to set the focus to the textbox after entering the first letter.
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All these four methods don't work. The registerstartupscript call doesn't even render the script when i search the page source after postback. I also tried to add a HiddenField to my webpart and set it's value to the control id of the textbox in onfocus, then register a startupscript in OnLoad that focuses the control if the HiddenField has a value, but to no avail.
What I am trying to achieve:I am trying to take the value of the selected index and depending on what this value is (e.g. the case selection in the code below) run a different query on the dataset and then create a repeater control dynamically to output each row with an item template
that I can use css to style.
In other words: When a user choses a list item it shows only rows from the dataset that match the list item chosen. For example if a user choses Closed Tickets they only see rows from the dataset that have a STATUS of 'CLOSED'.
What I have done so far: [Code]....
What I'm struggling with at the moment is:
1) That the case selection works but the selection of the appropriate data from the dataset doesn't seem to be happening. And this data isn't getting stored in rows as I had hoped.
2) I'm not sure entirely how to display the dynamically created repeater control in the admin.aspx page.
I am new to asp.net. I am trying to display some data from a database table using dynamic table in my page. I want to add checkboxes to a field in the database and would like to perform several tasks based on the values checked. The checkboxes are tied with the primary key field of the database. Here is the code snipet :
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Now I have a button in my page. The functioanlity which I desire is on clicking that button I should be able to extract the values of checked checkboxes and perform some function.
I have a database with some data in. Now I'm trying to show that data on my page whit a ListView.
For each object from the database a ListView will generate a dropdownlist.
I also have a DataPager on my page and this is where the problem occurs.
Each object generated from the database has a field that may look like this example.: 1,2,3.
In my code now I´m trying to split this string of comma character and add new items to my dropdownlist.
This works as long as I do not have DataPager on. But if I choose to view an x number of pages at the time when the page loads, I have value in the dropdownlists, only on my first page.
A piece of my code:
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