I am using asp.net. I am trying to split the data which is in datatable. I have a code sample like this:
{ dt=objErrorLoggingDataAccess.GetErrorDetails(errorID);
string[] stringSeparators = new string[] { "Message" };
string error = dt.Rows[0]["Message"].ToString();
string[] test = error.Split(stringSeparators, StringSplitOptions.None);
string PageName = test[0].ToString();
PageNameLabel.Text = PageName;
stringSeparators=new string[] {HttpContext.Current.Request.Url.ToString()};
error = dt.Rows[0]["Message"].ToString();
test = error.Split(stringSeparators, StringSplitOptions.None);
string Message = test[0].ToString();
MessageLabel.Text = Message;}
in the datatable following data is there:
{....ID.......Message.......................................................................................................................
....1........http://localhost:10489/images/CategoryIcon/images Message : File does not exist. UserName: naresh#naresh.com
....2........http://localhost:10489/images/CategoryIcon/images Message : File does not exist. UserName: iswar#iswar.com}
My problem is: how can I split the Message and store in the label? I want
{http://localhost:10489/images/CategoryIcon/images}
separately and UserName separately and the message separately. How can I do that? By executing the above code I am able to split
{ http://localhost:10489/images/CategoryIcon/images
}
only. How can I split the Message column and store in pageLabel, MessageLabel, UserNamelabel?
I would use a regular expression in this case. Because only by splitting this string looks a little bit to inflexible to me.
I tested your data example against this quick and dirty RegEx:
(?<id>\d+)\.*(?<url>\w+:\/\/[\w#][\w.:#]+\/?[\w\.?=%&=\-#/$,]*)\s*Message\s*:\s*(?<message>.*)UserName:\s*(?<username>([a-zA-Z0-9_\-\.]+)#((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3}))
It supports valid URLs and EMail patterns.
Regex regex = new Regex(
"(?<id>\\d+)\\.*(?<url>\\w+:\\/\\/[\\w#][\\w.:#]+\\/?[\\w\\.?"+
"=%&=\\-#/$,]*)\\s*Message\\s*:\\s*(?<message>.*)UserName:\\s"+
"*(?<username>([a-zA-Z0-9_\\-\\.]+)#((\\[[0-9]{1,3}\\.[0-9]{1"+
",3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|"+
"[0-9]{1,3}))",
RegexOptions.IgnoreCase
| RegexOptions.CultureInvariant
| RegexOptions.IgnorePatternWhitespace
| RegexOptions.Compiled
);
// Capture the first Match, if any, in the InputText
Match m = regex.Match(InputText);
// Capture all Matches in the InputText
MatchCollection ms = regex.Matches(InputText);
// Test to see if there is a match in the InputText
bool IsMatch = regex.IsMatch(InputText);
// Get the names of all the named capture groups
// I included your fields as groups: id, url, message and username
string[] GroupNames = regex.GetGroupNames();
I don't know how often you need to call this code. Maybe you get in performance troubles if you have too much data. This regex is q&d - please adjust it to your needs.
Related
I would like to create a table the name of which comes from result of a query. Any very basic example will do. The result could be a single column , single row also. I just need a basic example so I can tweak and modify it as per my requirement.
any control command which creates a table requires the table name to be known in advance and part of the command's text.
you could run a 2-step flow programmatically, where:
the 1st step gets the table name (e.g. using a query),
the 2nd step generates the .create table or .set command string (based on the 1st), then invokes the command.
an example, using the .NET client library:
using Kusto.Data;
using Kusto.Data.Common;
using Kusto.Data.Net.Client;
using System.Linq;
namespace Playground
{
class Program
{
static void Main(string[] args)
{
const string clusterName = "myClusterName";
const string regionName = "westus";
const string databaseName = "myDatabaseName";
const string queryForTableName = "MyExistingTable | summarize count() by TableName | top 1 by count_ desc | project TableName";
var kcsb = new KustoConnectionStringBuilder($"https://{clusterName}.{regionName}.kusto.windows.net", databaseName).WithAadUserPromptAuthentication();
using (var queryProvider = KustoClientFactory.CreateCslQueryProvider(kcsb))
{
// step 1: get the table name, based on the result of a query
var tableName = queryProvider.ExecuteQuery<string>(queryForTableName).Single();
using (var adminProvider = KustoClientFactory.CreateCslAdminProvider(kcsb))
{
// step 2.1: generate the control command's text, using the value from step 1
var createTableCommand = CslCommandGenerator.GenerateTableSetCommand(tableName, "print value = 'This is a value in my new table'", isAsync: false);
// step 2.2: invoke the control command
adminProvider.ExecuteControlCommand(createTableCommand);
}
}
}
}
}
HTTPServletRequest req, has a method getParameterMap() but, the values return a String[] instead of String, for post data as
name=Marry&lastName=John&Age=20.
I see in the post data it's not an array, but getParameterMap() returns array for every key(name or lastName or Age). Any pointers on understanding this in a better way?
The code is available in Approach 2. Approach 1 works completely fine.
Approach 1:
Enumeration<String> parameterNames = req.getParameterNames();
while (parameterNames.hasMoreElements()) {
String key = (String) parameterNames.nextElement();
String val = req.getParameter(key);
System.out.println("A= <" + key + "> Value<" + val + ">");
}
Approach 2:
Map<String, Object> allMap = req.getParameterMap();
for (String key : allMap.keySet()) {
String[] strArr = (String[]) allMap.get(key);
for (String val : strArr) {
System.out.println("Str Array= " + val);
}
}
If you are expecting pre determined parameters then you can use getParameter(java.lang.String name) method.
Otherwise, approaches given above can be used, but with some differences, in HTTP-request someone can send one or more parameters with the same name.
For example:
name=John, name=Joe, name=Mia
Approach 1 can be used only if you expect client sends only one parameter value for a name, rest of them will be ignored. In this example you can only read "John"
Approach 2 can be used if you expect more than one values with same name. Values will be populated as an array as you showed in the code. Hence you will be able to read all values, i.e "John","Joe","Mia" in this example
Documentation
I have 2 List one stores the name of filterable columns(of type DropDown) and another store the values to load in those filterable columns.
List<string> filterableFields = new List<string>() { "A_B", "C_D", "E_F" };
List<string> AB, CD , EF;
Now at the run time I get the data from web service and I have written a function to to extract values for these filterable fields and store the values to 2nd List.
private void prepareListForFilterableColumns(XDocument records)
{
foreach (var currentField in filterableFields)
{
var values = (from xml in records.Descendants(z + "row")
let val = (string)xml.Attribute("ows_" + currentField.Replace("_", "_x0020_"))
where val != ""
orderby val
select val
).Distinct();
switch (currentField)
{
case "A_B": AB = values.ToList(); break;
case "C_D": CD = values.ToList(); break;
}
}
}
Now I was thinking that instead of hard coding the assignment in swtich case block, If I could just use the first List name "A_B" and replace "_" from it to point to my 2nd List and assign values.ToList() to it.
I understand that c# is a static language, So not sure if we can achieve this, but IF I can it will make my function generic.
Thanks a lot in advance for time and help.
Vishal
You could use a dictionary of lists of strings instead of 3 lists to store the values.
Dictionary<string, List<string>> val lists = new Dictionary<string,List<string>>();
And make the keys of the dictionary equal to the filterables: "AB", "CD",..
then, instead of AB you would use valLists["AB"] and could then reference reach list based on a string key.
The other option would be to use reflection but that would be slower and unnecessarily a bit more complicated.
I have a hidden field that gets populated with a javascript array of ID's. When I try to iterate the hidden field(called "hidExhibitsIDs") it gives me an error(in the title).
this is my loop:
foreach(string exhibit in hidExhibitsIDs.Value)
{
comLinkExhibitToTask.Parameters.AddWithValue("#ExhibitID", exhibit);
}
when I hover over the .value it says it is "string". But when I change the "string exhibit" to "int exhibit" it works, but gives me an internal error(not important right now).
You need to convert string to string array to using in for loop to get strings not characters as your loop suggests. Assuming comma is delimiter character in the hidden field, hidden field value will be converted to string array by split.
foreach(string exhibit in hidExhibitsIDs.Value.Split(','))
{
comLinkExhibitToTask.Parameters.AddWithValue("#ExhibitID", exhibit);
}
Value is returning a String. When you do a foreach on a String, it iterates over the individual characters in it. What does the value actually look like? You'll have to parse it correctly before you try to use the data.
Example of what your code is somewhat doing right now:
var myString = "Hey";
foreach (var c in myString)
{
Console.WriteLine(c);
}
Will output:
H
e
y
You can use Char.ToString in order to convert
Link : http://msdn.microsoft.com/en-us/library/3d315df2.aspx
Or you can use this if you want convert your tab of char
char[] tab = new char[] { 'a', 'b', 'c', 'd' };
string str = new string(tab);
Value is a string, which implements IEnumerable<char>, so when you foreach over a string, it loops over each character.
I would run the debugger and see what the actual value of the hidden field is. It can't be an array, since when the POST happens, it is converted into a string.
On the server side, The Value property of a HiddenField (or HtmlInputHidden) is just a string, whose enumerator returns char structs. You'll need to split it to iterate over your IDs.
If you set the value of the hidden field on the client side with a JavaScript array, it will be a comma-separated string on the server side, so something like this will work:
foreach(string exhibit in hidExhibitsIDs.Value.Split(','))
{
comLinkExhibitToTask.Parameters.AddWithValue("#ExhibitID", exhibit);
}
public static string reversewordsInsentence(string sentence)
{
string output = string.Empty;
string word = string.Empty;
foreach(char c in sentence)
{
if (c == ' ')
{
output = word + ' ' + output;
word = string.Empty;
}
else
{
word = word + c;
}
}
output = word + ' ' + output;
return output;
}
I know how to create an array and loop through it normally - but what if I need a multi-column array. e.g. usually I might do something like:
For Each row in NameofArray
Dim name as String = row
Response.Write("Hello " & name & "!")
Next
But what if I want to do something like:
For Each row in NameofArray
Dim name as String = row.name
Dim age as Integer = row.age
Response.Write("Hello " & name & "! You are " & age & " years old!"
Next
If this isn't possible with an array, is there another way I can accomplish this?
Create your custom data type:
public struct DataType
public string Name;
public int Age;
}
Such type you can than use in an array like that:
DataType[] myData = new DataType[100];
myData[0].Name = "myName";
myData[0].Age = 100;
Note, if looping through that array via foreach, the elements returned for each iteration cannot get altered. If this is an requirement for you, consider using 'class' rather than 'struct' in the above DataType declaration. This will come with some other implications though. For example, the instances of a class DataType will explicitely have to be created via the 'new' keyword.
After reading your comment I think my other answer is probably what you are looking for.
What type is row and what type is NameOfArray?
If you would like to make row into a coumpound type with several members then there a several options.
Structure Row
Public Name as String
Public Age as Integer
End Structure
for instance. If you would prefer a reference type substitute Class for Structure.
Or using anonymous types,
Dim row = New With {Name = "Bob", Age = 21}
Then you can use generics to make a list of rows that you can iterate through using ForEach.
Dim NameOfList As System.Collections.Generic.List(of Row)
or if it were a result of a LINQ query somthing that supported
IEnumerable(of New With{Name As String, Age As Int}). //Not sure if this is VB
I'm not certain I uderstand your question and hope this is the kind of thing you were looking for.
As you can see from my fellow answerers, the support for anonymous types is superior in C# but, since you asked the question in VB.Net I will limit myself to that context.
After reading your comment I think I understand the question.
You can do
///Spacer Top
Dim NameOfArray = {New With {.Age = 21, .Name = "Bob"}, New With {.Age = 74, .Name = "Gramps"}}
///Spacer Bottom
If you want to create an IEnumberable anonymous type of Name Age tuples ;-p
Did you tried Dictionary Class. You can loop through the Dictionary using KeyValue pair class.
// Create a new dictionary of strings, with string keys.
//
Dictionary<string, string> openWith =
new Dictionary<string, string>();
// Add some elements to the dictionary. There are no
// duplicate keys, but some of the values are duplicates.
openWith.Add("txt", "notepad.exe");
openWith.Add("bmp", "paint.exe");
openWith.Add("dib", "paint.exe");
openWith.Add("rtf", "wordpad.exe");
foreach(var item in openWith)
{
Console.WriteLine(item.Key +" can be open with " + item.value);
}
You need to (can) index into your array using the two dimensions ie...
Dim array(,) As Object = { _
{"John",26}, _
{"Mark",4} _
}
For row As Integer = 0 to array.GetUpperBound(0)
Dim name as String = CStr(array(row,0))
Dim age as Integer = CInt(array(row,1))
Response.Write("Hello " & name & "! You are " & age & " years old!")
Next
Though would be better storing this sort of information in a class or user defined type of some kind.