logo
down
shadow

Is there any way to check for string either it is null or blank?


Is there any way to check for string either it is null or blank?

By : Fahad Bubshait
Date : November 22 2020, 11:05 AM
around this issue .Net has provided default function for this purpose you should use like this.
code :
if (string.IsNullOrEmpty("any string"))
{
}


Share : facebook icon twitter icon
is there a better way to check a value is not blank or null than this

is there a better way to check a value is not blank or null than this


By : user2620831
Date : March 29 2020, 07:55 AM
Any of those help It's nearly that, but with if( value.length > 0 || value != undefined ) when value is null value.length will thhrow a runtime error TypeError: Error #1009 as you are trying to access a property on a null value.
so you have to check before that the value is non null as for example :
code :
if ((value||"").length>0) {doSomeThing();}
var str:String=undefined;
trace(str==null); // will output true
Powershell, check for blank input, zero evaluates as blank/null

Powershell, check for blank input, zero evaluates as blank/null


By : Jose
Date : March 29 2020, 07:55 AM
may help you . This is what I came up with. I ensure that the $OUChoice is an Int when you compare it against other numbers. This ensures that null input is a 0 and also allows for negative values.
code :
$OUchoice = -1
do
{
    try{
        $OUchoice = Read-Host "Pick a number 0-6" 
    }
    catch{
        write-host "invalid input"
    }

    Write-Host "You picked $OUchoice"
    Switch ($OUchoice) {
         {
            [string]::IsNullOrEmpty($OUchoice)} {
                write-host "Null Input"
                Break
        }
         {
            [int]$OUchoice -gt 6} {
                write-host "too high"
                Break
        }
         {
            [int]$OUchoice -lt 0} {
                write-host "too low"
                Break
        }
         {
            [int]$OUchoice -eq 0 } {
                write-host "equals zero"
                Break
        }         
    } 
}

    until (([int]$OUchoice -ge 0) -and ([int]$OUchoice -le 6) -AND (-NOT [string]::IsNullOrEmpty($OUchoice)))
write-host "OK"
How to check if field is NULL and blank?

How to check if field is NULL and blank?


By : Shajy
Date : March 29 2020, 07:55 AM
Any of those help I'm trying to remove the possibility of blank spaces by a value not existing in the database when creating the view for my lookup. The issue I'm having is that my CASE statement isn't working quite right when I'm trying to check for a NULL or blank value. It seems to work for those that are null but the blank doesn't seem to have as much luck. In this case I am trying to check for null or blank of importantField , Is this what you are after
code :
CREATE VIEW Lookup4 AS
SELECT TOP 140000 CONCAT(no,
    CASE WHEN (ISNULL(importantField,'') = '') 
        THEN '' ELSE ' ' + importantField END, 
            fieldname + ' ', anotherField2)  AS UNRELATEDFIELD, Code, 
    CASE NAME
        WHEN '101,,,,,' THEN 'value1e'
        WHEN '14,,,,,' THEN 'value3'
        WHEN '16,,,,,' THEN 'value4'
    END AS NAME
FROM  dbo.Lookup
Pandas DataFrame - Replace NULL String with Blank and NULL Numeric with 0

Pandas DataFrame - Replace NULL String with Blank and NULL Numeric with 0


By : Prudhvi Raju
Date : March 29 2020, 07:55 AM
help you fix your problem Use DataFrame.select_dtypes for numeric columns, filter by subset and replace values to 0, then repalce all another columns to empty string:
code :
print (df)
   0     1    2    3  4     5    6       7   8      9
0  1  John  2.0  Doe  3  Mike  4.0  Orange   5  Stuff
1  9   NaN  NaN  NaN  8   NaN  NaN   Lemon  12    NaN

print (df.dtypes)
0      int64
1     object
2    float64
3     object
4      int64
5     object
6    float64
7     object
8      int64
9     object
dtype: object

c = df.select_dtypes(np.number).columns
df[c] = df[c].fillna(0)
df = df.fillna("")
print (df)
   0     1    2    3  4     5    6       7   8      9
0  1  John  2.0  Doe  3  Mike  4.0  Orange   5  Stuff
1  9        0.0       8        0.0   Lemon  12       
num_cols = df.select_dtypes(np.number).columns
d1 = dict.fromkeys(num_cols, 0)
d2 = dict.fromkeys(df.columns.difference(num_cols), "")

d  = {**d1,  **d2}
print (d)
{0: 0, 2: 0, 4: 0, 6: 0, 8: 0, 1: '', 3: '', 5: '', 7: '', 9: ''}

df = df.fillna(d)
print (df)
   0     1    2    3  4     5    6       7   8      9
0  1  John  2.0  Doe  3  Mike  4.0  Orange   5  Stuff
1  9        0.0       8        0.0   Lemon  12       
Check if column is null or blank in DAX

Check if column is null or blank in DAX


By : user3614758
Date : March 29 2020, 07:55 AM
Any of those help If you are satisfied with adding an extra column that contains the "Yes" or "No" values, simple wrap the entire expression in a call to ADDCOLUMNS:
code :
EVALUATE
ADDCOLUMNS (
    FILTER (
        SUMMARIZE (
            NATURALLEFTOUTERJOIN ( 'Target_Category', 'Target_Form' ),
            'Target'[Area],
            'Target'[id],
            'Target'[Target date],
            'Target'[Target Time Range],
            'Target_Category'[Origin],
            'Target_Category'[Sectotion],
            'Target'[Location],
            'Target_Category'[Ethencity],
            'Target_FormResponse'[Area Used],
            'Target'[Description]
        ),
        'Target'[id] = VALUE ( "111373268" )
    ),
    "Area Used Yes/No", IF ( 'Target_FormResponse'[Area Used] > 0, "Yes", "No" )
)
ORDER BY 'Target'[Target Key]
Related Posts Related Posts :
  • X509Certificate2.Import with NCRYPT_ALLOW_PLAINTEXT_EXPORT_FLAG
  • Model expands on moving horizontally in unity
  • Custom response when Model binding fails ASP.NET Core API
  • Can you Serialize inside a set of Attributes by Set of Attributes?
  • ASP.NET Web API 2 - Filter POST requests by Query String
  • ValidationAttribute injecting services for unobtrusive client validation
  • UWP - Middle Mouse Wheel Button Click Event Handler
  • .Net Core 2.2 Cookie Authentication Problem
  • How have more than two expands in restier asp.net
  • Autofac Resolve with TypedParameter always pick up first the same type parameter expected?
  • Regluar expression problem. It does not find the needed part of the string
  • How to make a Sum of values in a list for Charts? [ SOLVED ]
  • Nested HttpWebRequest in c#
  • How to read a struct containing array of structs from TwinCat to C#
  • HttpPostedFileBase gets content length to 0 when C# iterates the zipfile
  • xamarin forms HttpClient incomplete Json
  • How can i write more than one string in one line?
  • ASP.NET Core MVC equivalent of Start Action Specific Page
  • Dynamic grid row count and column count with XAML
  • How to query the first entry in each group in NHibernate
  • How can you migrate an entity framework project to .NET standard when the fluent configuration is using HasDatabaseGener
  • Program freezes when using RSA.ImportParameters() on android platform
  • SQL select query - no seconds or milliseconds in datetime
  • ASP.NET Core CORS combining policies; enablecors in controller vs midleware configuration
  • How to stop Firebase Realtime Database Unity SDK listener load all child data at start of application
  • How to offset the Y position of every second column in a Grid Control
  • Client side or server side error on SecurityTokenValidationException certificate expiration
  • if String is empty then data is not inserting
  • How to pass dynamic parameter and inject repository in ActionFilter in asp.net Core 2.2?
  • Select element where attribute contains a certain substring
  • How to get JSON response for column names in database table
  • How can I safely unsubscribe from an Action in one line?
  • How to change icon ( of main Form + another child forms) programatically in c# code while compilation
  • Why is the result of adding two null strings not null?
  • Getting deserialized values
  • What are difference between use invoke and synchronizationcontext.Post object?
  • Asynchronous Communication
  • No connectionString could be found in the test project application config file
  • Building a website that converts address to longitude and latitude and saves in the database
  • WPF Border shape
  • How to Add ItemArray to DataRow at a specific Location in DataTable
  • Try within Linq query
  • How to reduce the execution time?
  • What does T stands for in C#?
  • WPF MVVM Databinding with parameters?
  • How to apply a custom style to a control inside of a custom control template?
  • ASP.NET 4.5 data binding model SelectMethod throw error
  • How does the compiler recognise Nullable<T> to be a 'special type'?
  • Populate DataGridview upon ComboBox selection
  • KeyCommand disabled MenuItem
  • get the data that was returned from the stored procedure SQL Server 2008 silvelight C# Linq
  • Text boxes are not filling when the Form Loads, Windows Form Application
  • multiple input and multiple output in ssis with executing bat file
  • How to replace a string using the original matched value
  • Splitting Date from DateTime
  • How to manage multiple windows in MVVM
  • Setting active a Chrome window (C++)
  • Adding a Custom Task Pane to Word (Without using VSTO)
  • Session is set or not in ASP.NET
  • Not able to pass eval to javascript function
  • shadow
    Privacy Policy - Terms - Contact Us © festivalmusicasacra.org