asp.net - Set default value for NULL in datatable -

-

I have the following code, which I have created in my project as an extension for datat. It really worked just to be wondering if any customization can be done. Thank you. =)

I understand that this question should be related in some way. Just ask through. 

  & lt; Extension () & gt; Public Function HasNull (DataTable as ByVal DataTable) Boolean as each column DataColumn as dataTable.Columns then dataTable.Rows.OfType (of DataRow) (). If any (function (r) r.IsNull (column)) again in return for this true termination if the next returned unreal end function & lt; Extension () & gt; Public function SetDefaultForNull (ByVal DataTable each column in each row DataRow dataTable.Rows as as DataTable) DataColumn as dataTable.Columns retarded value as DataTable to as object = row (col) so IsDBNull (value ) Then select the DynamicType.ToString as the dim datatype string = colage. Case Datapart Case "System.DateTime" value = New Date Time Episode "System.Decimal", "System.Int16", "System.Int32", "System .t64 "value = 0 Episode" System.String "Value = String.Empty Case" System.Boolean "value = False Case Else Value = 0 End Select row (col) = value end If you return to the next data datatable and function    
 
 
 So I will keep my comment here, what is this for:  
 According to the first method: I have to handle the case Input table  nothing , either < Return the code> logic afternoon exposure  or  true  /  incorrect .  
 Another minor improvement apart: I will loop the rows instead of columns. Consider that all the columns are non-final except that they are non-empty. You loop all the rows for all the columns before you find a null. If you loop those rows that you had determined that in the first line already (if the last column is filled with tap).  
 Then something like this:  
  & lt; Extension () & gt; Public function HasNull (so as DataTable DataTable) is nothing as Boolean If DataTable then throw new ArgumentNullException ( "DataTable should start", "DataTable") finished down allColumns = dataTable.Columns.Cast (DataColumn ). To do list (Boolean = Dataable.exe number), as the dim Hanilfield. Anyone (function) allColumns.Any (function (c) row.IsNull (c)) return hasNullField termination function   
 instead of using this extension to get the default value For all types of:  
  & lt; Extension () & gt; Public function GetDefaultValue (T t.IsValueType as kind as) object comeback Activator.CreateInstance (T) or return to some other end function of the end   
 The second method only It can be implemented in this way, by the way (make it  sub ):  
   
  Dim table as new table. Columns Add ( "ID", GetType (Int32)) table.Columns.Add ( "name", GetType (string)) table.Columns.Add ( "Date", GetType (DATETIME)) table.Rows.Add (1, " Test ", DateTime.Now) table.Rows .Add (DBNull.Value, nothing, nothing is) table.Rows.Add (nothing, DBNull.Value, DBNull.Value) if there are    Result:  
  1 test 25.07.2014 15:05:29 0 01.01.0001 00:00 : 00 0 01.01.0001 00:00:00   
  Edit : If you actually enter  null  strings with empty strings If you want to change, then you  GetDefaultValue : < / P> >  pre & lt; Extension () & gt; Public function GetDefaultValue (T as follows, replaceNullStringsWithEmpty in kind as Boolean) so t.IsValueType comeback Activator.CreateInstance (T) elseif replaceNullStringsWithEmpty andalso t = GetType (string) back then "" Anything else return End if end function   
 However, I do not like the exception of one type, later to differentiate between  null  and  ""  It is also impossible that I will do such things as the last step where you display the wire Want to

Comments

Post a Comment

Popular posts from this blog

ios - Adding an SKSpriteNode to SKScene from a child SKSpriteNode -

-
I have a SKScene where I am adding an SKSpriteNode I have subclassed the SKSpriteNode class to create this node. In the subclass I am defining some SKActions on Sprite. What do I want to do when the end of this phantom ends the SKAction sequence, then I add a new Prayer node to this scene. How is this possible. The following code is mine: The code for the sequence is that I'm running on the Scansprinitode subclass (TEMissileNode): - SKAction * moveDown = [SKAction moveToY: Self.position.y - 20 Duration: 0.2]; SKAction * animation = [SKAction animateWithTextures: textures timePerFrame: time / 7]; SKAction * moveMissileProjectile = [SKAction Moving: Pointoffscreen Term: Time]; SKAction * group = [SKAction group: @ [animation, movement projectile]]; SKAction * Sequence = [SKAction Sequence: @ [Hilldown, Group, [SKAction removalFromParent]]]; [Self run action: sequence]; From the main scene, I call those actions that execute these tasks TEMissileNode * missile = [tmissil...
Read more

Matlab transpose a table vector -

-
An embarrassing simple question seems to be, but how can I move a Matlab table vector? aTableT = aTable '; I tried a standard syntax for the simple interaction of a line vector to a line vector aTable : ATableT = reshape (aTable, 1, Height (aTable)); and aTableT = rot90 (aTable); According to the head, the last time table should work for table, see. However, I get this error code: Error type in using table / permit (line 396) Undefined function 'permute' for the input arguments. Error in rot 90 (line 29) b = magnitude (b, [2 1 3: ndims (a)]); NB: fliplr is not useful either pretty sure I have covered clear angles - any ideas? Thanks! Try changing your table into an array, move it, then back to a table In other words, try doing this: aTableArray = table2array (aTable); ATableT = array 2table (aTableArray. '); I have also read the document for rot90 , and it says that rot90 is definitely working for tables Do, and I find you...
Read more

c# - Textbox not clickable but editable -

-
I have a small form with 10 text boxes, I have set them in the correct tab order. I want them on my tab service I was wondering if there is a way to set the text box so that they can be selected for editing until they are tabbed. That is ... I do not want the end user to edit the text box to click on them, I just want to make them editable through tabu. this should do the trick public partial category poor text box: Text Box {Safe Override Zero WndProc (Ref: Message Message) {if (m.msg == (Int) WM.LBUTTONDOWN) {Return; // mount down events} base.WndProc (ref m); }} Window message enum can be found. How to do this without anherizing: text box : class EatMouseDown: netwindows {safe override zero WndProc (ref message message) {if (m.msg == (int) WM.LBUTTONDOWN) {return; } Base.WandProc (Ref M); }} Safe Override Zero Onload (EventEurge E) {base.OnLoad (e); How to do this without any part: left a clean part, whatever is important, this can be a buggy but it works R...
Read more