How Much Data Can Be Stored In Application Variable
Mar 9, 2010How much data can we store in Application variable in ASP.net.
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void Session_Start(object sender, EventArgs e)
{
// Code that runs when a new session is started [code]...
basically am using them to store user id and status, so that pages can be validated, by there use.i can stop person from accessing home directly wihtout signing is and so on.can session variable be hacked as they are stored in an external data source and are available to the full website?
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Save Chat Room Data In Application Variable Or DB?
Nov 4, 2010My application is Web App Chat Room , it supports following features:
1.Create/Join/Close room
2.Send message in room (just live message, offline message might be supported in future)
I have done logic for application, but I'm considering where to save chat room data (message,room information, and users in room) ? I see there are 2 options:
1. Application variable
2. Using file or database
-What if I saved in Application variable: In case of there are 2000 rooms and 10000 users online, mean I have to persistence in Application variable (actually in RAM memory) information of 2000 rooms, more than 10000 message (text), these numbers might be increased by second if there are more users online in real time. and what's next ? I don't know what will happen to server, crash ? or my web app will be terminated ? whatever I don't want both results!
-What if I saved in file or DB (i.e: SQL Server DB) Because of web application, clients have to send request every 1 second to fetch data (messages and user list in room). So in case of there are 2000 rooms and 10000 users online, means they will make 10000 requests every 1 second to DB. I don't know what will happen to DB, there are a lot of connections and in EVERY 1 second, can DB still be alive to serve request ?
I don't know where saving is good now because both seem are bad solution :(. What is your opinion ?
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[Code]....
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[Code]....
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[Code]....
I've been trying to use a variable for AVG(AA.Count) so that I don't have to process it three times,
[Code]....
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Unable To Get Stored Procedure Output Variable Through ExecuteReader
Jan 10, 2011here my code-
using (SqlDataReader sqlDataReader = ExecuteReader(CommandType.StoredProcedure, StoredProcedures.AuthenticateUser, sqlParameter))
{
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{
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Feb 27, 2011I have a SQL stored procedure on a SQL server that uses a variable to create a new database. This works in SQL I have a connection string that works I have added a sqldatasource to a webform, and configured the datasource to connect to the remote SQL database and am able to select my stored procedure. I am able to bind the variable to a control in the sqldatasource wizard (often two of the same control appear- if that is significant)
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As mentioned above, I have selected the right control in the sqldatasource wizard. So what do I need to do now?
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Should I be embedding my textbox in a dataview?
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[Code]....
The table variable @CaseNumbers is declared, and is a bunch of values are inserted using a table-valued function called SplitStringIntoInts. At this point I can select from @CaseNumbers and this works fine.But when I try to join onto @CaseNumbers, the name '@CaseNumbers' in the ON clause is highlighted with the error 'Must declare scalar variable @CaseNumbers'. What?! It's not scalar, I declared it ages ago and I have used it since!
SQL Server :: Stored Proc & Assigning Its Return Parameter Value To A Variable
Aug 1, 2010I have a stored proc. that returns the USL & LSL values for each of the 8 different Metrics. say, Defect Density (Upper Specification Limit) USL = 0.30 & Defect Density (Lower Specification Limit_ LSL = 0.05). Simillarly for 8 different Metrics. Why I need these Spec. Limits ?...Because I want o compare my project's Metrics Value displayed in the Grid View with the corresponding USL & LSL value of the same Metrics. IF Metrics Value is outside of USL & LSL Then I want to Mark the Metrics in Red Color.
1. STORED PROC "Get_Spec_Limits" Does Not Return Anything
2. Error : Object Reference Not set to an Instance of an Object, in the following "OnRowDataBound' Event
OnRowDataBound="GridView1_RowDataBound"
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Handles GridView1.RowDataBound
Dim strConnection As String = "Data Source=******;Initial Catalog=Metrics;Integrated Security=True"
Dim objConnection As New SqlConnection(strConnection)
Dim da As New SqlDataAdapter("Get_Spec_Limits", objConnection)
da.SelectCommand.CommandType = CommandType.StoredProcedure
Dim Productivity_USL As New SqlParameter("@Productivity_LSL", SqlDbType.Float)
Dim Productivity_LSL As New SqlParameter("@Productivity_LSL", SqlDbType.Float)
Dim IDD_LSL As New SqlParameter("@IDD_LSL", SqlDbType.Float)
Dim IDD_USL As New SqlParameter("@IDD_USL", SqlDbType.Float)
Dim EDD_LSL As New SqlParameter("@EDD_LSL", SqlDbType.Float)
Dim EDD_USL As New SqlParameter("@EDD_USL", SqlDbType.Float)
Dim DRE_FS_LSL As New SqlParameter("@DRE_FS_LSL", SqlDbType.Float)
Dim DRE_FS_USL As New SqlParameter("@DRE_FS_USL", SqlDbType.Float)
Dim DRE_TS_LSL As New SqlParameter("@DRE_TS_LSL", SqlDbType.Float)
Dim DRE_TS_USL As New SqlParameter("@DRE_TS_USL", SqlDbType.Float)
Dim DRE_Code_USL As New SqlParameter("@DRE_Code_USL", SqlDbType.Float)
Dim DRE_Code_LSL As New SqlParameter("@DRE_Code_LSL", SqlDbType.Float)
Dim COQ_USL As New SqlParameter("@COQ_USL", SqlDbType.Float)
Dim COQ_LSL As New SqlParameter("@COQ_LSL", SqlDbType.Float)
Dim COPQ_USL As New SqlParameter("@COPQ_USL", SqlDbType.Float)
Dim COPQ_LSL As New SqlParameter("@COPQ_LSL", SqlDbType.Float)......................
DataSource Controls :: Execute Stored Procedure Using A String Variable
Jun 22, 2010Is it possible to save execute stored proc command in a string variable and then execute string variable?
Does this logic fits into LINQ2SQL? Why I want to do this - INstead of passing user control references to server, I want to save user control values to string in client side java script and then pass string to server to do actual stored proc execution. Hopefully this will improve performance.
SQL Server :: Assign Result Of Count Stored Procedure To C# Variable?
Aug 7, 2010I have an aggregate stored procedure (named sp2) that returns a count of records meeting a certain criteria ASrecCount. I am using a DAL per the ASP.NET tutorial and have created a Table Adapter (named
sp2TableAdapter) with GetData and Fill methods. I have a button on an ASP.NET page that launches an event handler. In the button's event handler, I have this line: sp2TableAdapter sp2 = new sp2TableAdapter();
What works so far:
This code will bind the value of sp2 to a data control:
sp2TableAdapter sp2 = new sp2TableAdapter();
DropDownList1.DataSource = sp2.GetData();
DropDownList1.DataValueField = "recCount ";
DropDownList.DataTextField = "recCount";
DropDownList1.DataBind();
When running this page and clicking the button, the numeric value of recCount returned from sp2 is bound to the DropDownList control and 1 row is poplated with the recCount value (in my case 1451).
Problem:
In the event handler, I do not want to bind the value of recCount to a control, but want to to use it in some logic as an integer. What is the C# code that will do this? (In place of the DropDownList control lines above)
DataSource Controls :: Assign Value To A Variable From Exec In A Stored Procedure?
Apr 21, 2010I have this SPDECLARE @PERC VARCHAR(50)
DECLARE @nome_soc_repl VARCHAR(50)
set @PERC = '(select round((' + @nome_soc_repl + ' /(select sum ('+ @nome_soc_repl+ ') from exptot_perc))*100,2)
from exptot_perc)'
EXEC (@PERC)
nome_soc_repl is a varible that contains my table name
so I need to extrac the result of EXEC...for examples 15...... and put it on another variable.....
Format Of Local Variable As Input Parameter In Stored Procedure In Sql Server
Jul 28, 2010Stored procedure ALTER proc [dbo].[spSearchCombo](@searchBy nvarchar(50),@searchKey nvarchar(50)) as select * from CD_DETAILS where @searchBy like '%' +@searchKey+ '%' I'm using ASP.net2.0 with c# to extract rows basedon search key from a text box and searchBy for the column to be searched. When i use column name instead of @searchBy which comes from value selected from a ddropdownlist i get the desired result . There seems to be a problem with format of @searchBy and i get a blank page.
protected void btnSearch_Click(object sender, EventArgs e)
{
string constring = ConfigurationManager.AppSettings.Get("con").ToString();
SqlConnection conn = new SqlConnection(constring);
conn.Open();
SqlCommand cmdSP = new SqlCommand("spSearchCombo", conn);
cmdSP.CommandType=CommandType.StoredProcedure;
cmdSP.Parameters.Add(new SqlParameter("@searchBy",SqlDbType.NVarChar,50));
cmdSP.Parameters["@searchBy"].Value=ddlSearchBy.SelectedValue.ToString();
cmdSP.Parameters.Add(new SqlParameter("@searchKey", SqlDbType.NVarChar, 50));
cmdSP.Parameters["@searchKey"].Value=txtSearch.Text.Trim();
SqlDataAdapter da=new SqlDataAdapter(cmdSP);
DataSet ds=new DataSet();
da.Fill(ds);
this.dgv1.DataSource=ds.Tables[0].DefaultView;
dgv1.DataBind();
}
C# - Is A Variable Stored In Session Deserialized Once Or Multiple Times Throughout A Page Lifecycle
Jan 27, 2010I would like to wrap Session variables in a manner similar to that discussed on CodeProject.
[code]....
Here is my question: if I have to access CurrentUser multiple times in the same page, would I get a performance improvement by assigning it to a local variable instead of accessing the wrapping property? Or does the HttpSessionState make sure the object is only deserialized once per request, so that subsequent calls in the same http request don't cost any more?