.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Null values in formula fields

Posted By:      Posted Date: September 16, 2010    Points: 0   Category :ASP.Net
Hi,I tried using this and am concatenating the fields together.  It does not appear to be working.  Here's what I have.  Any suggestions?   IIF(IsNull({nomination.recparty1}), '0.0', {nomination.recparty1} ) &  chr(13)IIF(IsNull({nomination.recparty2}), '0.0', {nomination.recparty2} ) & chr(13)IIF(IsNull({nomination.recparty3}), '0.0', {nomination.recparty3} )andif IsNull({nomination.recparty1}) then '0.0' else {nomination.recparty1} & chr(13)if IsNull({nomination.recparty2}) then '0.0' else {nomination.recparty2} & chr(13)if IsNull({nomination.recparty3}) then '0.0' else {nomination.recparty3}Both this gets failed beacuse my fields are returned as null.Please get me to solve this.Thanks in advance.Regards,Mugil

View Complete Post

More Related Resource Links

How to deal with NULL values in a SQL table


 Hi all

In order to add/update/delete data from a table I build 2 classes: 1 class containing all the table fields and another class with methods to add/insert/update/delete records. I am learning how to avoid errors when your table must use SQL NULL values. One error is when I call my UPDATE method (see below):

  public void UpdateItem(OcItemConstraintDetails item)
  SqlConnection con = new SqlConnection(connectionString);
  SqlCommand cmd = new SqlCommand("ItemConstraints_Update", con);
  cmd.CommandType = CommandType.StoredProcedure;

  cmd.Parameters.Add(new SqlParameter("@itemConstraintId", SqlDbType.Int, 4));
  cmd.Parameters["@itemConstraintId"].Value = item.ItemConstraintId;

  cmd.Parameters.Add(new SqlParameter("@path", SqlDbType.NVarChar, 150));
  cmd.Parameters["@path"].Value = item.Path;

if you watch the SQL profiler trace you will see that I am passing a value of 'default' ;so that causes me problems.

exec ItemConstraints_Update @itemConstraintId=1,@path=default

With that said, what are the best practices when your SQL table accepts NULL values and when:
- you are passing an empty value to your stored procedure;

Linq to SQL returns null for DateTime fields.


I have a linq to sql entity class in which I declared some DateTime fileds like this:

[Column(DbType = "smalldatetime")]
public DateTime? StartDate { get; set; }

And this is how I fetch data form repository:

return repository.Logs.OrderByDescending(l => l.LogID).FirstOrDefault();

All non DateTime fields are filled properly but all datetimes are null.

[Column(DbType = "smalldatetime")]

        public DateTime? StartDate { get; set; }

Help: Too many lines of code to achieve a simple goal: keep my NULL SQL values...


Hello all

What is the best way (best practice) to preserve my NULL SQL values in the database
during an insert/update operation (without receiving cast invalid errors)?
Also, how to display a string 'n/a' when a sql value is NULL?

My project is using FormView with Edit/Insert templates and classes to represent my tables

Goal1....: display 'n/a' when there are NULL SQL values in the database
Solution1: I am using ISNULL(field,'') in my store procedure for SELECT statements

Goal2....: if the fields are 'n/a', then save them back in the database as NULL
Solution2: on my insert/edit methods I am having to check the values being passed, i.e:

cmd.Parameters.Add(new SqlParameter("@scope", SqlDbType.NVarChar, 50));

if (item.Scope == "n/a")
 cmd.Parameters["@scope"].Value = DBNull.Value;
 cmd.Parameters["@scope"].Value = item.Scope;

Not to mention that for SQL DateType fields when you use ISNULL(field,'') the return string is '1/1/1900 12:00:00 AM'
and I have to change the field value in every field that represents a date, i.e:

protected void FormView1_DataBound(object sender, Sy

Values in user control fields empty when AutoEventWireup=true ?

As a BizTalk developer I'm trying to build a ASP.NET website so some obvious things might be new to me (so please be gentle). I have a web form and I have a user control on it. This user control contains a panel with some user properties that are to be stored in a database. So far nothing fancy. The user control itself contains a panel and is working fine (all code to retrieve and store the values is working). I used the default settings of creating a user control and one of them was AutoEventWireup=true. This works fine because I also have some dropdown boxes (and other fields) that need to be filled with values from the database and that happens in the Page_load event. The panel specifies the 'DefaultButton' which calls a method when clicked to save the values after the user has changed them. On this click the code of the method is called, I confirmed that, but I found out that the values of my controls on the user control (for example the Textbox control) are empty. As a non-ASP.NET developer I couldn't figure out why. So I changed some settings like AutoEventWireup to false. Off course this resulted in my dropdown boxes no longer to be initially filled, but my surprise was big to find out my controls actually contained the values the user typed in. Logically I need both the values and th

error in MVC2 on empty string form fields which are required: "This property cannot be set to a null

In model I have:[DisplayName("ISBN")] [Required(ErrorMessage = "ISBN is required.")] [StringLength(50, ErrorMessage = "ISBN book must have max {1} chars.")] [DisplayFormat(ConvertEmptyStringToNull = false)] public string isbn { get; set; }But when I submit form with empty field ISBN I have an error - ConstraintException: This property cannot be set to a null value.I have find that other people have the same problem and they say that debbugger in VS2010 works wrong - yes ?http://p2p.wrox.com/book-professional-asp-net-mvc-2/79788-constraintexception-unhandled-user-code.html#post259245http://efreedom.com/Question/1-3129080/Server-Side-Validation-REQUIRED-String-Property-MVC2-Entity-Framework-Workhttp://mvcmusicstore.codeplex.com/workitem/6604

Updating a List item field value in a SPD Workflow is setting Date fields to null

Hello everybody,I faced a very weird behavior while creating a workflow in SPD against a Document Library.Here is the case:1- Create a document library in sharepoint site.2- Add a custom column of type DATE.3- Upload any document to the library4- Edit the item metadata and set the custom date field to any date you want.5- Now using sharepoint designer, create a very simple Workflow with only one action that updates the current item "Title" field to any value. (Note: In my case I set the workflow to start manually and not automatically)6- Save the workflow and then start it on the uploaded item.7- Now check the value of the date column after the workflow is finished.8- You will see that the Date field is Empty... (very weird)Notes:   1-This behavior will not appear on a standard list. it is only appearing in a Document library.  2- I am using WSS 3.0 SP2 + MOSS 2007 SP2. Also SharePoint designer 2007 SP2Did anyone face this situation and does it have a fix, or am I doing something wrong here... Please help.Regards,Maheed

How do you add duplicate fields to a SSRS custom report and receive differtent output values.

I have built a custom report in SSRS 2008 using fields for supplier and customer.   I have added a Parent Row Group using the Supplier field for the group expression and used the Customer Details as my child details group. This returns a list of all customers for each supplier.   (Supplier | = Customer details ( Name, Dob etc.)   How would I add an additional Supplier field to the customer details returning only values for other Suppliers used by a customer, not the value of the Supplier listed in the Parent Group?

SSRS Report based on SSAS Cubes doesn't show NULL values correctly

I have a SSRS report which is based on an SSAS Cube. In the Cube the formating of numeric fields that NULL values are properly shown as NULL values. In the Cube Browser and Excel this is shown correctly. However when I design the report already the query against SSAS shows these fields as "0" instead of NULL. Is there a way to fix this or is this a bug ?  

Gridview RowCommand Event returning null values

HiI'm trying to retreive values entered by users in the textboxes in the footer of the gridview and insert these values into another sql table.My code is as follows :-protected void GridView2_RowCommand(object sender, GridViewCommandEventArgs e)    {       if(e.CommandName.Equals("addnew"))       {                       TextBox t1 = (TextBox)GridView2.FooterRow.FindControl("tfrm");            string frm = t1.Text;            TextBox t2 = (TextBox)GridView2.FooterRow.FindControl("tsub");            string sub = t2.Text;            string cmd = "insert into suggestions values('" + frm + "','" + sub + "','c','c')";            con.Open();            SqlCommand com = new SqlCommand(cmd,con);            int a = com.ExecuteNonQuery();&n

Number of query values and destination fields are not the same

If RadioButton1.Checked = True Then rbtn = 1 Else rbtn = 2 End If ' Our insert command strSQLQuery = "INSERT INTO tblJobs " _ & "(filingDate, filingDay, reportDate, reportTime, company, jobsite, location, duration, DrugTestReq, foreman, instructions, jobSteward, nPlumbers, nFitters, nWelders, nTradesmen, nPlAppr, nFitAppr, nServTech, nHelpers) " _ & "VALUES (@DTValue, @TextDay, @DTValue2, @TextValue, @TextValue2,@TextValue3,@TextValue4,@TextValue5,@rbutton,@TextValue6.@TextValue7,@TextValue8,@NumVal,@NumVal2,@NumVal3,@NumVal4,@NumVal5,@NumVal6,@NumVal7,@NumVal8)" ' Create new command object passing it our SQL insert ' and telling it which connection to use. objCommand = New OleDbCommand(strSQLQuery, objConnection) ' Add parameters that our SQL command takes: 'radio button 'OleDbType. objCommand.Parameters.Add(New OleDbParameter("@rbutton", OleDbType.LongVarChar)) '- objCommand.Parameters.Add(New OleDbParameter("@DTValue", OleDbType.Date)) objCommand.Parameters.Add(New OleDbParameter("@TextDay", OleDbType.LongVarChar)) objCommand.Parameters.Add(New OleDbParameter("@DTValue2", OleDbType.Date)) objCommand.

Comparing Null Values(from variable) in SSIS

Hi All I need to create a script that checks to see if a variable value is NULL, if it is then it executes the next SQL Task and if not then the package has finished. I have this in a SQL 2000 DTS package script: Function Main() If isnull(DTSGlobalVariables("NextLoadDate")) Then Main = DTSStepScriptResult_DontExecuteTask Else Main = DTSStepScriptResult_ExecuteTask End if End Function As you can see, all I want to do is check to see if a variable is null then don't execute the next task. But i cannot get it to work in a SQL 2005 SSIS package, so far I have created a script and come up with the following: Public Sub Main() If Dts.Variables("NextLoadDate").Value.ToString <> "" Then Dts.TaskResult = Dts.Results.Success Else Dts.TaskResult = Dts.Results.Failure End If End Sub Any Ideas? Thanks BigGopher

Comparing columns with NULL values--Merge says unmatched when data is matched.

I found the article below describing this same issue with the Oracle merge statement.  It also described a work-around:    http://searchoracle.techtarget.com/tip/Merging-datasets-with-NULL-values I have been unable to find a solution to this issue for SQL Server 2008.  I am trying to do basic ETL from Staging table to a Type II dimension table in a Data Warehouse.  I am using the Merge statement with the Unique key minus the modification date as my merge key list.  I have a handful of columns (in both Staging and the DW) containing nulls in my merge key list.  I have tried the ISNULL function and the ANSI_NULL db option (OFF) with no success.  When I put zeros in the null columns, it works as expected.  I am about to try separate INSERT and UPDATE statements, but I fear that the NULL comparison issue will bite me there with the JOIN statement.  Has anyone else experienced this?  NULL values are valid in our Data Warehouse.  How can I make T-SQL handle them? Thank you for your help, Jesse

Problems querying XML data with null values

If the tags have "xsi:nil" in them, then my query failes with a "XML parsing: line [x], character [x], undeclared prefix" error.  So my question is how to get the query to handle or ignore those tags with "xsi:nil" embedded in them.  So specifically, the first SQL query below is successful, and the second one fails with the aforementioned error.  Any comments appreciated, thanks. -- Declare XML variable DECLARE @data XML; -- Element-centered XML SET @data = N'<data> <customer> <id>1</id> <name>Allied Industries</name> </customer> <customer> <id>2</id> <name>Trades International</name> </customer> </data>'; -- Using the query() method SELECT T.customer.query('id').value('.', 'INT') AS customer_id, T.customer.query('name').value('.', 'VARCHAR(20)') AS customer_name FROM @data.nodes('data/customer') AS T(customer); Returns: 1 Allied Industries 2 Trades International ================== -- Declare XML variable DECLARE @data XML; -- Element-centered XML SET @data = N'<data> <customer> <id>1</id> <name>Allied Industries</name> <fax xsi:nil="true" /> </customer> <customer> <id>2</id> <name>Trades International</name> <fax xsi:nil=&quo

Create unique constraint on a column which has null values

Hi All, I have a table suppose 'Temp' having one of the column as 'ColA' which has some null values as well as non null values. Now i have a requirement to create a unique constraint on it. We have tried but couldnt do it.Apart from having a trigger on insert and update statements is there any other alternate. Can any one please help me on this. Thanks & Regards, Srikanth  

Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign

Using Visual Studio with MySQL.In my XSD dataset I created a query. It runs perfect. I can preview the data fine.In my BLL I wrote code (see below) to retrieve the query results and I'm getting...Using db As New dsDemoTableAdapters.DemoTableAdapter Dim dt As New DataTable dt = db.GetDemo(DemoId) ' ERROR HAPPENS HEREFailed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.Why would previewing the data work but in code it fails?Any ideas?

System.Reflection: How to use the name of fields within classes to get the values?

Hey there, I have  a class defiend as follows:public class VisitorStat { public int? PageViews { get; set; } public int? Visits { get; set; } public int? Visitors { get; set; } ... } At some point in my program, I need to gather the  Visitor stats and create a report table.List<VisitorStat> visitorStats = GetVisitorStats(startDate, endDate);   My issue is this: Because there are many rows in the table, rather than hard coding the name for each row as: "PageViews", "Visits", "Visitors"... I want a way to use the name of the fields in the class to create the Row name and insert the appropriate values. I found out about System.Reflection and wrote the following:  Type type = typeof(VisitorStat); // Get type pointer FieldInfo[] fields = type.GetFields(); // Obtain all fields //Start creating a row for each field in the class foreach (var field in fields) // Loop through fields { object temp = field.GetValue(null); //The first cell in the Row contains the name of the field Cell Col2Row1 = new Cell(new Paragraph(field.Name)); PdfTable.AddCell(Col2Row1); //for item returned when calling the function to get t
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend