Forms Data Controls :: Pulling A Value From A Gridview?
Jun 28, 2010
I'm trying to pull a value from a Gridview so that I can create a running subtotal. I've looked at a number of examples but they all seem to fail.
Why does this not work? Each and every reference I try to make to the cells "value", comes up null.
Sample code1:
[Code]....
Sample code2:
[Code]....
In sample code 2, I get the "header text" for the column...but I know the value in the cell...so it fails on a data conversion.
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Nov 23, 2010
I have a GridView, bound to a table (Meals) in a SqlDataSource.
Into that GridView, I have added a TemplateField, which contains a DropDownList (which displays the numbers 1 - 10, added manually; no Data Binding). And, I've added a ButtonField.
When I click the Button, I want the values of some of the GridView rows PLUS whatever value was selected in the DropDownList to be pulled out and stored in a second Sql table (Orders).
Pulling the rows bound to the SqlDataSource is easy but JavaScript is needed (I think) to pull the SelectedValue from the DropDownList. I understand women more than understand JavaScript (that's how little I know) and the code below has been kindly offered by another forum user who is at a loss, himself, now.
Here's the code and the error message I'm getting.
ASPX:
[Code]....
And here's the Code Behind:
[Code]....
No design time errors reported but here's the run time error:
Object reference not set to an instance of an object.
On the following line:
Line 28: if (row.RowType == DataControlRowType.DataRow)
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Apr 28, 2010
I have a templated control embedding a checkbox in a GridView I have an event on the checkbox which has a loop that pulls ALL of the checked checkboxes and the associated value. I only want to pull the datavalue of the checkbox that I just checked but the properties/methods associated with that checkbox event are not giving me any sort of index or item.value from which to do this.
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Aug 31, 2010
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Oct 7, 2010
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Feb 1, 2011
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<%# Eval("add_1") & ","%>
<%# Eval("Add_2") & ","%>
<%# Eval("Add_3") & ","%>
OUTPUT:-
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Jan 7, 2010
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Feb 3, 2010
I currently designed a school result portal. If the students want to view their result, they input their student school number in a text box to search out their result. But this is not secured because anybody can look up any students result if you have the number which is even written on their school uniform for identification.
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Jul 22, 2010
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Jul 15, 2010
I am working on an asp webform that pulls from an ODBC datasource then puts the data in an sql server. Once the data is in the sql server several queries pull data from it to provide information for a report.
This is an example of what I am talking about
private
void ODBCpdEmployeeAb()
{
DataTable dt =
new
DataTable();
[Code]....
The first part gets the data from the ODBC connection and the next part stores it in an sql server table. The problem is I have these methods in the page load event of the webform so everytime it loads it just puts the exact same data in the sql server table which would then provide incorrect information on the report.
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Feb 17, 2010
I was hired to do some contract work for a short contract. I am looking at this code on this Aspx web form. What they do is load the labels for a radio button list from an ObjectDataSource object. Well this is the first time I have ever heard of an ObjectDataSource. The problem is that I don't even know where this object is pulling data from. With a SqlDataSource object, I can easily view the flyout menu to see the sql query where the data is being pulled from. Anyway, I need some figuring out where objectDataSourcePlanType lives and where it is pulling data from. I know I can't list the entire project, but I am sure someone who is familiar with ObjectDataSource
<tr>
<td>Type of Plan</td>
<td><img alt="Required" src="/Images/arrow.png" /></td>
<td>
<asp:RadioButtonList ID="radioButtonListPlanType" runat="server" AutoPostBack="True" DataSourceID="objectDataSourcePlanType"
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RepeatColumns="1" RepeatDirection="Vertical" AppendDataBoundItems="true">
</asp:RadioButtonList>
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SetFocusOnError="true" />
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</asp:ObjectDataSource>
</td>
</tr>
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Jun 14, 2010
I have written a web scraping program to go to a list of pages and write all the html to a file. The problem is that when I pull a block of text some of the characters get written as '�'. How do I pull those characters into my text file? Here is my code:
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HttpWebRequest request =
(HttpWebRequest)WebRequest.Create(baseUri);
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reader.Close();
response.Close();
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Dec 21, 2010
I'm getting ready to start a C# web application project and just wanted some opinions regarding pulling data from a database. As far as I can tell, I can either use C# code to access the database from the code behind (i.e. LINQ) of my web app or I can call a stored procedure that will collect all the data and then read it with a few lines of code in my code behind. I'm curious to know which of these two approaches, or any other approach, would be the most efficient, elegant, future proof and easiest to test.
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Sep 19, 2010
I am trying to avoid enabling EnableViewState..Sample code as you can see has 1 repeater and 2 textboxes inside. I bind the textboxes at page init. After a postback I want to get the updated data from the client & save in a db. The Request.Form contains the data keyed with autogenerated client ids but the repeater has 0 items after the postback. So my options seem limited to.a. Enable viewstate so I can pull the data from the repeater using Control.Find(...)b. iterate through Request.Form and find my textbox values...ultimatly the goal is to to render data from a datatable to some textboxes, allow the user to make changes then save these changes. I'd like to avoid viewstate if there is a clean alternative..ASPX:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Foo.aspx.cs" Inherits="Ads_Foo" EnableViewState="false"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-
[code]...
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Feb 1, 2011
So I have been trying to follow serenarules posts about persistence layers, but I seem to be missing something.
The persistence layer is an architectural layer whose job is to provide an abstract interface to information storage mechanism(s).
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So in what cases is this necessary? When you are pulling similar data from multiple information sources?
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Feb 25, 2010
we have a program that we work with with in 2 different locations, both of the program instances must share the same database.what i did is to open Web Sharing folder on our server then i added on both computers this folder to their "My network places" and direct both of application to this folder which contains the database.this is how i direct the program :
Code:
D:WNKKWnkk.exe \MyServerktest
nk2008
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some pointers:i added the shared web folder to one of our website directory and thats mean that the port the program is using is 80
is port 80 is slower then others?
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May 12, 2010
The DoctorGen Table has primary key DocId and Doctors has Keys set on DocId and MemId. I want to get all records from DoctorGen where UserID = @UserId even if there are no matches in the Doctors Table. I'm not getting any records.
[Code]....
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May 26, 2010
I am pulling a date from an Access Database and inserting into my Dataset. I am assigning it to "myDate" and then assigning it to my SQL parameter @StartDate.
When I run my ExecuteNonQuery I get a null value in my SQL database. There are no null values in my access database. I must have the syntax wrong.
[Code]....
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Jan 5, 2010
[Code]....
I have a select statement that is supposed to be filling grid with information from an income table. It's only supposed to pull if the income is from the current fiscal year or is less than 1 year old. Currently, what it does is pull multiples of rows and also rows from past income years but only if there is a mixture. For instance, if a person has income from 2005 and 2010 what it will show is this
Income 2005
Income 2005
Income 2010
Income 2010
Income 2010
Does anyone know what I've done wrong? BTW, those results are exact, old income is shown twice, current is shown 3X
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Jun 24, 2010
I have a page that displays updated data every few seconds but instead of pulling data from database, I would like DB to push data only if the data has been changed. Is that possible?
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Nov 4, 2010
I am having a slight issue with grabbing data from my masterpage into my content page (as a whole).
I have generated a public property for the my textbox and the contentpage can see this public property. But it comes across empty (even from within the masterpage). Now I guess the problem is with the property itself (possibly). It also shows as empty when I response.write it's value to the page.
Even when I call the value of the property in the masterpage it comes across as empty. The way I have this setup is that a textbox named pageTitleField has it's value updated from an iframe. All is working well and the textbox has its value updated correct upon iframe content changes. This is great. Now I just need to pass this textbox value into my content page and then set it as the document title.
see my code thus far.
My MasterPage
[Code]....
My MasterPage CodeFile
[Code]....
My ContentPage
[Code]....
My ContentPage CodeFile
[Code]....
I know the public property is being seen from the content page because if I just do a Response.Write(Master.GrabPageTitle) I see System.Web.UI.WebControls.TextBox appearing as the output of that property. So it appears hat the textbox value is not being captured in the public readonly property.
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Nov 29, 2010
I'm creating a pseudo invoicing system. I've got a webform where users can pick such informaiton as days, companies, etc to pull the information to create the invoice for and then they click a submit button. I'm wondering what the easiest method would be to get this information. I've had success with such commands as:
DropDownList SourceTextBox = (DropDownList)Page.PreviousPage.FindControl("DropDownList2");
but how can you pull this information through the SQLDataSource tools? When I choose to alter the "WHERE" in the sql clause to a control items in the previous page are not accessible.
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May 17, 2010
The Response.BinaryWrite( does not like what I am giving it.
I am making a ShowImage page pulling the image from a SQL table.
Here is where I am at the moment:
protected void Page_Load(object sender, EventArgs e)
{
string myConnection = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlConnection objConnection = new SqlConnection(myConnection);
objConnection.Open();
SqlCommand objCommand = new SqlCommand("SELECT TOP (1) NEWID() AS row,ImageID, ImageName, ImageType, ImageData FROM ImageTable Order by Row", objConnection);
objCommand.CommandType = CommandType.Text;
SqlDataReader objReader = objCommand.ExecuteReader();
if (objReader.Read() == true)
{
Response.ContentType = objReader["ImageType"].ToString();
Response.BinaryWrite(objReader["ImageData"]);
}
// RotateImage.ImageUrl = (string)objReader["url"];
// RotateImage.ImageUrl = (string)objReader["ImageData"];
// Response.ContentType = objReader["MIMEType"].ToString();
// Response.BinaryWrite(objReader["ImageData"]);
objReader.Close();
objConnection.Close();
}
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Dec 13, 2010
I have two web forms. There is a Button Control on one web form and One DropDownlist on another web form which binds "States" on Page_load().
If i click on button in the first web form which pulls out one state (for ex: VA-Virginia) but it should be highlighted and displayed in the dropdown of next web form.
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Mar 17, 2010
My company uses SharePoint 2007 as a CMS. We have a set of publishing sites. When servers go down, we would like to apply a status message. It doesn't have to be automatically applied, just would appear on first load (if a message exists) or a subsequent refresh. Here's how we would like it to work:
- Status message is located in a text file on the server.
- When a page loads, we would like each it to check to see if there is anything in the text file, and if so, display the message on the page.
- If the text file is empty, we would like it not to display anything on the page.
I can think of a few different ways this could be accomplished using PHP or something, but I'm at a loss as how to do it within SharePoint. Ideally we would be able to place such a block of code into the masterpage.
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