Web Forms :: Can The Request Data (from Control) Be Populated The Same Way As Mvc
Aug 17, 2010
I saw first few video tutorials and they seemed to get the values from the control like text = Textbox1.text; All the form fields are got this way. On the other hand in mvc all the request parameters are populated into a model object. I am not sure whether this already exists or not, but is there any mechanism built-in asp.net which would populate the data from the controls automatically and give us a nice model object which can be saved directly onto the db. Something like this:
<asp:textbox ... ... value="${model.name}">
I don't remember the exact syntax of textbox control. So in this case the textbox would be filled when get request and put into model object when posted back.
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Aug 19, 2010
I am trying to persist data in a dynamically populated ListBox in a user control. Here are the details
I have a user control which contains a a listBox and button. On Page_Load of user control I am populating the ListBox control with some values. On Click of button, I am trying to fetch the values which I have selected in ListBox. Though this seems very simple and straight forward I am unable to fetch values.
My Page_Load Function
void Page_Load(object sender, EventArgs e)
{
If(!IspostBack)
{
listBox.items.Add("Item1");
listBox.items.Add("item2");
listBox.items.Add("item3");
}
}
My Click Function
Protected Void Button1_Click(object sender, EventArgs e)
{
string strValue = listBox.SelectedValue
}
I have placed brake point at Page_Load and on click function, I am seeing that the moment the breakpoint hits Page_Load function (before If (!Ispostback)) , listBox.SelectedIndex is becoming -1.
One more thing here is, I am placing this user control in an SharePoint application page to be specific checkin.aspx page . ( I know this should not be done, but that is the requirement for me)
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Jun 16, 2010
how to programmatically create an ASP.NET Menu Control populated using LINQ to SQL (with an unknown number of levels) and couldn't find one anywhere. It took me a while to figure out the logistics of it so I thought I would post my final solution so that you don't have to spend time figuring this out for yourself. Note that I am a self taught developer so I am potentially breaking any number standards coding protocols.
In this example I am working with an ASP.NET project named Virtual. Non-Standard NameSpaces are Virtual.(tools, components) etc...
1. Create your database table that will eventually be used to populate your menu control.
[Code]....
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Aug 18, 2015
I want to learn how to use form view but i can't find any tutorial that have a get data from database and display using form view or inserting data to database.
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Jul 18, 2010
DropDownList Not Being Populated
[Code]....
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Aug 23, 2010
I have the following code:
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using Oracle.DataAccess.Client; // ODP.NET Oracle managed provider
using Oracle.DataAccess.Types;
namespace MyTestApp {
public partial class _Default : System.Web.UI.Page {
protected void Page_Load(object sender, EventArgs e) {
OracleConnection conn = new OracleConnection("User Id=UID; Password=PWD; Data Source=XE; Pooling=false"); try { conn.Open(); } catch ( OracleException oe ){
Console.WriteLine("ERROR : " + oe.Message); }
if ( !Page.IsPostBack ) {
if (conn.State == ConnectionState.Open) {
// get data GetMoleculesToShow(conn); } }
// clean up connection conn.Dispose(); }
static void GetMoleculesToShow( OracleConnection conn ){
String division; String rxotc; String molecule_name;
String prodnum; String proddesc; String molecule_class; String nonactive;
// create command object and set attributes
OracleCommand cmd = new OracleCommand("schema.package.procedure", conn);
cmd.CommandType = CommandType.StoredProcedure;
//Bind values
cmd.Parameters.Add("mol_to_show_cur", OracleDbType.RefCursor);
cmd.Parameters[0].Direction = ParameterDirection.Output; try {
// Execute command, have parameters populated cmd.ExecuteNonQuery();
// Create OracleDataAdapter, data provider object to populate dataset
OracleDataAdapter da = new OracleDataAdapter(cmd);
//Populate dataset with "molrefcur"
DataSet ds = new DataSet();
da.Fill(ds, "mol_to_show_cur", (OracleRefCursor)(cmd.Parameters["mol_to_show_cur"].Value));
//Verify dataset is begin populated //DataTable dt = ds.Tables[0];
//foreach ( DataRow dr in ds.Tables[0].Rows ) //{
// division = dr["division"].ToString();
// rxotc = dr["rxotc"].ToString();
// molecule_name = dr["molecule_name"].ToString();
// prodnum = dr["prodnum"].ToString();
// proddesc = dr["proddesc"].ToString();
// molecule_class = dr["molecule_class"].ToString();
// nonactive = dr["nonactive"].ToString(); //}
if (ds.Tables[0].Rows.Count != 0) {
// display dataset values GridView gvMolecules = new GridView();
gvMolecules.DataSource = ds.Tables["mol_to_show_cur"].Rows;
gvMolecules.DataBind(); } }
catch (OracleException oe) {
Console.WriteLine("ERROR : " + oe.Message); }
finally { cmd.Dispose(); } } } }
The dataset is being populated, however when the page renders, the data nor the gridview are visible. I have tried using both IE and Firefox, binding / not binding the columns, AutoGenerateColumns Y / N with no success. As I am new to all of this ( VS2008, ASP.NET, C# ) I can't help but to think I am overlooking something basic.
I am using the following :
- VS 2008
- MS Vista SP2
- Oracle XE ( local )
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Oct 7, 2010
I am doing when the form loads up
DataGridViewComboBoxColumn ComboTextCol = new DataGridViewComboBoxColumn();
ComboTextCol.Headertext = "some";
ComboTextCol.DataSource = GetEmployees().Select(e => new { Name = e.LastName + " ," + e.FirstName, ID = e.EmployeeID }).ToList();
ComboTextCol.ValueMember = "ID";
ComboTextCol.DisplayMember = "Name";
datagrid.Columns.Insert(0,ComboTextCol);
I tried this too datagrid.Columns.Add(ComboTextCol). GetEmployees gives employee data I see the column but not the the data...??
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Oct 17, 2010
Dynamically populated Radiobuttonlist?
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Aug 5, 2010
My page includes a button and a GridView bound to a LINQ data object which is bound to a table. when the page loads the gridview gets populated with the data and all work well. The button has an empty method, when I click the button I get en error message "Intenet explorer cannot display the web page" I put a break point at the begining of the method listed below but I get the error message before it gets there. If I remove the gridview than the button works well.
[Code]....
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Mar 11, 2010
I am having some difficulty enabling sorting on a gridview that has data in it that has come from an objectdatasource.
The AllowSorting="True" function doesnt work for ObjectDataSource so I need to find a work around...I am guessing that I will need to do something in code in order to get this off the ground.
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Feb 7, 2011
In a webpage in my project there is one textbox and a gridview.
Gridview is being populated by some parameters coming through Request.QueryString from previous.
When gridview is populated a very huge data appears.
In gridview there is one column:
SR status
1425688 pending
2678549 closed
5342875 transferred
What I want to do that in a textbox user type SR number and the row containing search parameter should be selected only.l
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Sep 28, 2010
I have a dataview running a stored procedure that's populating a textbox. I then want to edit (or not) that text and insert it using another query. However, whenever I populate the text box, it will always insert the original text. If i don't populate it, it will insert whatever text I input.
[Code]....
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Sep 29, 2010
I have a business class "Repositorio" with methods to create, update and delete objects.
i have a gridview and i need to fill it with the list of objects returned by these methods.
i used like this:
[Code]....
The problem is that i need to select, delete and edit itens, but the grid dont recognize the other methods...
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Feb 28, 2010
In my webpage there are some dropdown controls bounded by object datasource with postback= true.
By default there is a value (CurrentDate) selected in one of the dropdown.
To display data there is a gridivew.
When the page is loaded by default gridview is populated with some data as per currentdate.
In same page there is an image to export data to Excel. By default I mark this image's visible= false.
Therefore if the data is populated then the image should be visible to everyone to download data to Excel, if not populated then it should remain hide.
For this purpose I used this code:
[Code]....
But exactly don't know where to write above code. If I write in Page_Load event then on runtime it displays error that:
Value cannot be null.
Parameter name: Statement_Date
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Mar 28, 2010
m using a listview and an object data source in my application, with optimistic concurrency control.i have only 2 columns in the listview: category_ID and category_name;when i try to delete an item, an error message is generated saying that one of the old values populated by the list view is null, i performed debugging, and found that the category_ID old value is populated correctly, while the category_name old value is populated as nulli can't find a problem in the code, i executed the delete command in the query builder directly and it worked fine,
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Mar 28, 2011
I have a gridview which contains a templatefield. Inside this is an ImageButton and a dropdownlist. This is all created in the aspx page, although the ddl list items are populated in the RowDataBound event in the vb page. When i change the selected item in the drop down list and hit the imagebutton, the selected item is not maintained after postback. Instead the first record is displayed in the dropdownlist. I have wrapped an If Not Page.IsPostback around the datasource and databind's but this doesn't help. I have tried enabling viewstate in all areas on the page too, but still nothing. The list items for the ddl must be created on RowDataBound also. As far as I am aware, my ddl is not really dynamic, its just the list items which I add in the code behind which are classed as dynamic.
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Feb 14, 2011
I have a gridview thats being populated from an excel file that is loaded through a fileupload control. I want to save the contents of that gridview to a table in my SQL database. I've searched the web and tried to loop through the gridview, but failed at it.
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Apr 29, 2010
My dropdown list is populated by a group of names inalphabetical order.
However, I would like "Please Select Name" to be the first item in dropdown list.
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May 13, 2010
I'm a little new in ASP.NET, so i don't know how the .NET machine fully works..I'm using two strategies to solve my problem, both invoked by a Button.Click event, but i don't know which one is better..My worries are about the server overload and page load time.This is the regular approuch i've used..
[Code]....
The second one is by using a funtion (named checkIfNumberExistsInDataTable) that does a binary search in a datatable to find a number
conn.Open()
Dim dr As SqlDataReader = cmd.ExecuteReader
Dim da As New DataTable()
[code]...
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Sep 15, 2010
I am trying to simulate the file system like explorer using a treeview. I would like to have the application in the server but is the starting root limited to where the application is? Is it possible to have a certain directory in the server to be the starting node? I would like to be able to set a starting node in the config.
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Jul 23, 2010
the problem is actually in the subject. I have custom control that uses treeview. The control is added dynamically. Nodes for this treeview are populated on demand. Treeview nodes can be checked. I recreate this control on page load event, but still CheckedNodes is empty if checked nodes were added dynamically (added on demand).
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Jun 21, 2010
not quite sure where I'm going wrong here. I'm trying to manually handle sorting in a Gridview that is populated with the following data source:
[Code]....
[Code]....
[Code]....
At the moment, nothing is happening when I click on the column headings. I ran it in debugging mode in Visual Studio and put a breakpoint on the Sorting event handler. I noticed that the variable dtSortTable is empty even after the TryCast(VacanciesGV.DataSource, DataTable). If I hover over this statement in debugging, it shows the data from the file system, so it does appear to be reading it.
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Nov 8, 2010
We do have a search page for customers which returns a list of data from a table.
Once we select on an item it should redirect to another page with customerId as a querystring parameter..
Now the problem is we have to save all the customerIds and need to send them to display page..and need to select next one once they done with previous one without going to the search page again..
Example:
if they got 10 customers in the search page then we need to send all 10 ids to display page by starting display of firstone and once they select next button on display page they have to move on to the next cutomer from that list..if they reached the end of list they have to start again from the first...we need to avoid the user going to the search page for each customer every time...
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Feb 10, 2011
currently I am doing a web application such that after user search for all the contracts,the contract id is a hyperlink in which user can click on it to view the results tied to it. There is 2 pages. One is for the search page and after searching results is populated below. The contract id in the grid view is a hyperlink so that when user clicks on it, they will go to another page and view the specific records tied to it. How shld I do this as I am creating this web application in 3-tier formatting.
This is the search.aspx:
[Code]....
This is the next page that will display the results tied to this particular ID:
[Code]....
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Jul 23, 2010
I have a Collapsible Panel Extender inside a datalist.I have a hyperlink inside the panel within the datalist. I want to have a modal popup on clicking the hyperlink inside the panel and I want the modal pop up to be populated with the data from the navigate URL property of the hyperlink. Is it possible to do this? I am attaching my code,this is currently throwing an exception which I am guessing is because it is unable to find the hyperlink in the panel within the datalist :-
[Code]....
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