MVC :: Dictionary Have Value Null When Returning From Views?
Nov 20, 2010
My model include this attribute
public class RegisterModel
{
//blah blah Attribute[code]....
before run into the view , i check the field , see it contain value . But after running through this view
[Code]....
The output field is null , while other attribute still ok , why is it ?how can i resolve this ?
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May 21, 2010
Is there a better way to write the code below? I have quite a few blocks that are similar, and this is making the code in the Viewpage very messy to work with. The data value with the associated label only needs to be output when certain conditions are met, which is almost always if the value is not null. The options I can think is to use a response.write to atleast minimize the usage of the ASP script tags, or to format the webpage is such a way that the label displays with an appropriate n/a type value.
<% if (myData.Balance != null)
{ %>
Balance: <%= String.Format("{0:C}", (myData.Balance))%>
<% } %>
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Jun 10, 2010
This is regarding GetPreloadedEntityBody() function of HttpWorkerRequest class . I am using this method to get perloaded data of requested page. but GetPreloadedEntityBody() function alway returns me null value , while same code is working for server with IIS6.0
1) I have Application_PostAcquireRequestState event . on which i do all user releated validation.
2) After Sucessful validation i am creating object like below code snippet of worker process.
Dim hwr As HttpWorkerRequest =
CType(context.GetType.GetProperty("WorkerRequest", Reflection.BindingFlags.Instance
Or Reflection.BindingFlags.NonPublic).GetValue(context,
Nothing), HttpWorkerRequest)
3) AFter That checking where request has body or not and the calling GetPreloadedEntityBody() which is returning null alway for IIS7.0 ,while in IIS6.0 same code is working fine.
if hwr.HasEntityBody
Then
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what more do i have to do so that i can get return value form GetPreloadedEntityBody() function.
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Jun 17, 2010
[Code]....
iam using asp.net2.0 with c# with sql server 2000 when iam executing the procedure in local system it is working fine.but when iam executing in client system procedure returns null value, i have checked all connection string , and session value all are working
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May 25, 2010
I have an ASP.NET web service which returns an XMLDocument. The web service is called from a Firefox extension using XMLHttpRequest.
var serviceRequest = new XMLHttpRequest();
serviecRequest.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
I consume the result using responseXML. So far so good. But when I iterate through the XML I retrieve nodeValue - nodeValue is always null. When I check the nodeType the nodeType is type 1 (Node.ELEMENT_NODE == 1).
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In my webservice I have created a string with the XML i.e. xml="Hank"
I then create the XmlDocument
XmlDocument doc = new XmlDocument();
doc.LoadXML(string);
I know I can specify the nodetype using using CreateNode. But when I am just building the xml by appending string values is there a way to change the nodeType to Text so Node.nodeValue will be "content of the text node".
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Apr 18, 2010
Im currently experincing some difficulties with the viewState. The scenario is that i have a datagrid that has a column of buttons that when pressed will store a value in the viewState. I have already done this on one occasion in the same page, but for some reason the second item in the view state is always returning null, even when i hardcode in a number in before the postback. Im at a loss as to why this is happening, anyone expericened this and know what is wrong.
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Apr 7, 2010
I have 3 radio buttons op1, op2, op3 working as a group. In the code behind I check to see if a paticular button is checked, then do some processing. The problem is all the buttons return null. Checked in the debugger and all values are null even op1 which value is set to true.
Front end code for the buttons are:
<asp:RadioButton ID="op1" runat="server" AutoPostBack="True" Checked="True"
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<asp:RadioButton ID="op2" runat="server" AutoPostBack="True"
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<asp:RadioButton ID="op3" runat="server" AutoPostBack="True"
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if (op1.Checked)
{.....do stuff...}
if (op3.Checked)
{.....do stuff...}
if (op3.Checked)
{.....do stuff...}
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Jul 8, 2010
i want to get dynamically the Data Source value from which system iam acessing the website and concatenate in connection String
but still showing null value
[Code]....
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Feb 8, 2010
This problem is driving me nuts. I have labels inside a gridview. When i reference them, i keep getting a null error. This is definatly that it cant find the labels inside the template. below is my code that i am using.
[Code]....
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May 7, 2015
[URL] .....
I have an error with this tutorial.
Line 13:
Line 14: Private Sub BindGrid()
Line 15: Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
Line 16: Using con As New SqlConnection(constr)
Line 17: Using cmd As New SqlCommand("Customers_CRUD")
Imports System.Data
Imports System.Configuration
Imports System.Data.SqlClient
Public Class tessatusatu
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
[Code] ......
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Jul 1, 2010
I am using
SqlHelper.ExecuteDataset(MyConnectionString, CommandType.StoredProcedure, "GetInformation", new SqlParameter("@ID", ID));
In my stored Procedure, I am doing a lot of calculation with joins and it took 19 sec to execute at my sql Server 2008. My application had been working perfectly for 5 days but now as database increases, I found a problem that my connection is breaking at that point. At Sql Server, it execute fine but when I add a breakpoint and watch the stored procedure is returning null.
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Apr 1, 2011
I have a problem:
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Here is view example:
<div class="editor-field">
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@Html.ValidationMessageFor(model => model.BirthDate)
</div>
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but during loading my View I get this exception
The model item passed into the dictionary is null, but this dictionary requires a non-null model item of type 'System.DateTime'.
That's because of BirthDate is null in database but it is nullable and I expect that it just leaves the filed empty.
And I have Shared EditorTemplate:
@model System.Nullable<System.DateTime>
@if (Model.HasValue)
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Dec 23, 2010
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{
if (emailCache.ContainsKey(accountName))
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Sep 2, 2010
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{
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string frm = t1.Text;
TextBox t2 = (TextBox)GridView2.FooterRow.FindControl("tsub");
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int a = com.ExecuteNonQuery();
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}
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Jan 29, 2010
(This is a more narrow question)
In my asp.net MVC action, I am looking if the ReturnUrl value is in the URL.
My Url looks like this:
[URL]
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The code:
if(Request.QueryString["ReturnUrl"] != null)
{
}
Tracing through the application, it is just skipping the if statement's body i.e. it is NULL.
How can this be explained?
[URL]
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See code below.
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Dec 6, 2010
I have setup my business object to have a create_date and edit_date members both datetime datatypes. My company want to display the create_date and edit_date fields in a gridview for each transaction. The problem i have is that after insterting a record it will have a valid create_date but no edit_date and when displayed in the gridview it defaults to datetime.minvalue (My default). How on earth do i show an empty field in my gridview for a null datetime field in the database?
I am using similar architecture to the Imar Spaanjaars example of a tiered solution. With a few small tweeks it has worked well for me for ages. I am passing a List<Database> to my object datasource which connects to my gridview.
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Oct 2, 2010
I have 2 table Table A, Table B.
Table A - Parent Table
ID - Uniqueidentifier not null(PK)
Table B -Child Table
ID - uniqueidentifier null(FK, TableA)
I have a stored procedure to insert data into Table B, but when I tried to insert a null value into column ID of table B, this error came up:
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_tableB_tableA". The conflict occurred in database "database name", table "table A", column 'ID'.
The statement has been terminated.
The insert statement in asp.net is like so:
sqlcommand.parameter.add(New Sqlparameter("ID", Nothing))
I am guessing adding nothing to the null value column is the problem, but i don't know how to fix it... The INSERT statement conflicted with the FOREIGN KEY constraint "FK_tableB_tableA". The conflict occurred in database "database name", table "table A", column 'ID'.
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