I'm creating some url rewriting for asp.net. Now I am tobbing if I should include the id in url or just the title. Do you guys know if it's a significant performance hit to lookup an item by title instead of id?
View 4 Replies
In my application I have the following message:Object reference not set to an instance of an object.
@Html.DropDownList("Title",ViewData["PersonTitle"] as SelectList, Model.Person.Title)
The dropdownlist contains simple strings (person titles). When you select a title, that title should be returned to my model. Controller code:
ViewData["PersonTitle"] = new SelectList(new[] { "Dhr.", "Mevr." });
Why is this not working ? Edit: The purpose is to change
@Html.EditorFor(model => model.Person.Title)
into something like this
@Html.DropDownList("Title",ViewData["PersonTitle"] as SelectList, Model.Person.Title)
I have a dropdown that has datain the format "ID Title" sorted on the Title.
Ex data is
122343 Another Example
320078 Machines are fun
953278 This is an example title
145678 Welcome to my world
Now the data in the dropdown is becoming too large. And customers have to scroll down a lot to get to a specific title. What I am trying to do is give links above the dropdown (A, B, C, ...., Z, 0, 1, ...., 9). When A is clicked the dropdown should select the first Title that begins with A and so on.
I have to display the contacts in gridview.I'm using objectdatasource. I have given the select method of objdatasource below:
Code:
Imports Microsoft.VisualBasic
Imports system.Data
Imports System.Data.SqlClient
Imports System.Collections
Imports System.Collections.Generic
Public Class Contactmanager
Dim conn As New SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings("localConnectionString").ToString)......
And I realise that a user/member can have mutlple roles.HOW Can I do a select SQL query that returns the result set like this (SQL 2005)
SELECT Roles FROM <tbl>
WHERE UserID = <GUID>
AND Roles IN ('AA','CC')
i have a query that select random records in access database in terms of time : "SELECT TOP 10 * FROM Tbl ORDER BY Rnd(-10000000*TimeValue(Now())*[ID])" now i wish to convert this query for using in sql server 2005 such that return random records in term of time
View 5 RepliesI have a select statement and want to be able to insert some spaces in the returned data:
[Code]....
For the parts with ' - ', I want to remove the dash and simply put spaces now. But when I remove the dash and put 4 spaces, I only get one space. How do I put in those 4 spaces?
The drop down list is used to determine what search criteria will be used to find an invoice. I tried to set the Select method in the switch statement. I don't understand how to set the Select Method and the select parameters programmatically though . I tried a few different ways but can't make the compiler happy. My ODS is in scope in the code behind. I'm not able to access it's properties though. The BAL resides in a separate project that is a ClassLibrary. I also have a using statement for the ClassLibrary project in the code behind.
give me an example of how to do this?
Mark up:
[Code]....
[Code]....
[Code]....
[Code]....
protected void Button19_Click(object sender, EventArgs e)
{
SqlDataSource conn = new SqlDataSource();
conn.ConnectionString = ConfigurationManager.ConnectionStrings["Database2ConnectionString1"].ToString();
conn.SelectCommandType = SqlDataSourceCommandType.Text;
conn.SelectCommand = "SELECT FROM table1 (a, b)VALUES(@a,@b)";
conn.SelectParameters.Add("a",TextBox1.Text);
conn.SelectParameters.Add("b", TextBox2.Text);
int rowsAffected = 0;
try
{
rowsAffected = conn.Selectt();
}
catch (Exception)
{
Label1.Text = "Error";
}
finally {
conn = null;
}
if (rowsAffected != 0)
{
Label1.Text = "Data saved";
}
}
well it returns error no overloading method for select (P.S. same code work fine for insert)
Can any one let me know about the below issue. I have a page which has three labels, say startdate,enddate and username. My issue is if the user doesnot select any of the above three then a message gets displayed as "Please select one search criteria" or if the user doesnot enter the date in correct format then i dispaly "Please enter date in mm/dd/yy" format. But what is happening is first time if the user doesnot select any then "Please select one search criteria" is getting displayed and after this message gets displayed if the user enters wrong format of date then both the messages are displayed.
View 5 RepliesI will declarate a attribute, but it gives me an error
This query works fine and returns 1 record from type int:
SELECT TOP 1 DataObjectVersionID
FROM tblDataObjectVersionPropertyValueText
WHERE PropValue like CAST('00010281' AS ntext)
ORDER BY DataObjectVersionID DESC
And when I will declarate a attribute/parameter it gives me an error:
DECLARE @dataObjectVersionId INT
SET @dataObjectVersionId = SELECT TOP 1 DataObjectVersionID
FROM tblDataObjectVersionPropertyValueText
WHERE PropValue like CAST('00010281' AS ntext)
ORDER BY DataObjectVersionID DESC
Error message:
Msg 156, Level 15, State 1, Line 2
Incorrect syntax near the keyword 'SELECT'.
i'm trying to to create a simple string array with data retrieved from a select statement(SELECT firstname FROM customers , for ex.)
View 6 RepliesI have gridview. some columns are data, and some are link buttons. now, I need move these link buttons to a hovermenu. this is done. but I got a javascript exception, and it is because if there is no row was selected in gridview, it will pop this.
so, the question is: how can I select a row in gridview without select command? simply by code?
Is it possible to add multiple select statements in a single stored procedure. The select statements are getting data from different tables. If yes, could anybody provide an example in adding multiple select statements, which retrieve data from different tables in a stored procedure.
View 3 RepliesIs there any way to do this? I can't find anything to latch on to.
View 2 RepliesHow would i make a select statement select the row with the nearest values? e.g.: I have 3 labels, labels1 2 and 3, with values of 1.2, 2 and 5.8 In my table i have 4 columns, first is the data im after, and the next 3 relate to the three labels. I want to select one row, where the values of labels match it the closest.......
View 8 RepliesI am trying to write a stored procedure that takes out a list of blog entries from a table (tblFeedEntry) as well as the amount of comments that each blog entry has gotten (tblFeedComments) but all I can get is the total amount of comments of all blog entries together, displayed on all entries. This is how my code looks today:
[Code]....
I am guessing that the problem is that the declared variable is not picking up the id of the blog entries, instead it picks up everything. The original select and the select in the declared variable are not connected. How do I connect them?
This query does not return any record
[code]....
i have two tables named
1.LookupPageInfo and (LookupPageInfoId,pathmessageID,pagemessageID)
2.Messages (MessageId,MessageText,ChannelID)
Now i need to write a query something like this........in the query i need to pass the pathmessageid and needs to get messagetext from Messages Table,i am not sure how i need to write the below query..can someone guide me how can i write a query......as below..
select LookupPageInfoId,
PathMessageID,
pagemessageID,
(select messagetext from Messages where MessageID=PathmessageId) as TEXT from LookupPageInfo
I'm using the code below to extract data from a gridview and populate it into textboxes for the days and two drop downs for Project and Category.
For some rows in the gridview everything but the category ddl populates correctly. If I click the row a second time the category ddl displays the correct category.
why I have to click twice for some rows?
[Code]....
I need to set a select back to it's default value after it's been changed based on certain conditions.
View 2 RepliesI am moving to the world of ASP.NET from an Access VBA / VB6 background and having read a few books on the subject I am still confused about communicating with SQL server in VB with ASP.NET.
As a very quick explination I am used to communicating with the server by passing strings containing the data I want to write (or read) such as:
[Code]....
I do not seem to be able to work out from ALAX, Dynamic Data, Bound Controls, DataViews, connecting to services with SOAP, DataSources and all of the other methods of database communication in ASP.NET which is the right system to do the simple reads and writes in SQL that I want to do.
At present I have a page with all of the controls on it required to collect a block of data I want to insert, it is all now fully validated but although I can build the SQL INSERT command in a string I cannot figure out how to fire it over to the local SQL Express server. Am I even doing this correctly or do I need to look at other controls?
What is difference between select { } and select new {} In Linq Query
View 3 RepliesI want to select a row of gridview and display a DetailsView. There is issue of real estate on page so I do not want to use a select button.
View 5 RepliesAsp.net 3.5 linq2sql
I need to present gridView with the OrderDetails and having 1 column with product name.
How can I get select values from 2 types in 1 select?
Like from orderDetials.* and the product.name ?
[Code]....
I don't want to use a costume container like a class that contain all the above props,
Can I use the the datacontax or object[] or expression instead?
