I need to pass a js multidimensional array (the dimensions are not known at compile time) to my code-behind in c#, I have done this in the next way:
var AdjustItems = ""; //My string variable to store the array separated with '|' and '-'
for (var i = 0; i < adjusts.length; i++) { //adjusts is my js array
AdjustItems += adjusts[i].Motive + '|' + adjusts[i].Amount.toFixed(2).toString() + '-';
}
if (AdjustItems != "") {
AdjustItems = AdjustItems.substring(0, AdjustItems.length - 1);
}
g('arrAdjust').value = AdjustItems; //arrAdjust is my hidden input.
Is there another way to do this where I can get the array, like an array and not like a string in c#?
Is there another way to do this where I can get the array, like an
array and not like a string in c#?
The only way to communicate between the client and server is with strings. Therefore, you must use a library like JSON to pass complex variables between the client and server.
You can use javascript's built-in JSON library to turn your array into a string. This would change your example to the following:
g('arrAdjust').value = JSON.stringify(adjusts);
Then, use a C# JSON parsing library to convert it to an array on the server side. This stackoverflow question may help you with C# and parsing the JSON.
Related
Coming from Python, I could easily do array[0][0], but doesn't seem like it in C#.
When I try to fetch data from my MySQL database, it gives me a 2D array, hence the need to use a 2D array.
Array looks like this:
[[hello], [world]]
I'd like to just fetch the string "hello". How would I manage that?
You use
string value = array[0,0];
Here:
var array= new String[,] {{"Hello","World"}};
string value=array[0,0];
You can access multidimensional arrays like this:
int val = a[2,3];
The above statement takes 4th element from the 3rd row of the array.
In your case it would be:
string val = a[0,0];
Pretty straightforward: arrray[0, 0]
Reference
This line code returns number of elements.
document.getElementsByClassName("entry entryWriteable");-> returns 70 elements
I want to implement a loop so that, Below line of code will execute for all the element.
document.getElementsByClassName("entry entryWriteable")[i].value;
Can any one help me how to impliment in C# selenium ?
In order to execute JS in selenium on C# you should use the next code:
((IJavaScriptExecutor) Driver).ExecuteScript("your code"));
So you can execute any JS code you want.
The ExecuteScript returns object so probably you can typify it.
Like Denis said, but if you need a return value of all values in entire element array, then try:
using OpenQa.Selenium.Webdriver.Extensions
driver.ExecuteJavascript<string>(`
var els = document.getElementsByClassName("entry entryWriteable");
string returnAllElementTexts = "";
for(var i = 0; i < els.length; i++) {
returnAllElementTexts += els[i] + "|";
}
return returnAllElementText;`);
This will return a pipe-delimited string of all values. Split on pipe from C#. Is that what you wanted? All text values from array of elements?
I have a simple c# function that returns an array like this:
protected int[] numArray()
{
int [] hi = {1,2};
return hi;
}
I'm trying to get these values into my javascript so I'm trying to do this in asp.net:
var array = '<%=numArray()%>';
window.alert(array[0]);
window.alert(array[1]);
However, instead of passing the array back, it seems to pass a string ("System.Int32[]"). The first alert prints an 'S' and the second prints a 'y'. How can I print my numbers instead. Will I have to return a string from my c# code?
You need to serialize the array to JSON. One way to do it is with JavaScriptSerializer...
using System.Web.Script.Serialization;
// ...
protected string numArrayJson()
{
int [] hi = {1,2};
var serializer = new JavaScriptSerializer();
var json = serializer.Serialize(hi);
return json;
}
Now this should work...
var array = <%=numArrayJson()%>;
The actual script outputted to the page should look like this...
var array = [1,2]; // a javascript array with 2 elements
window.alert(array[0]); // 1
window.alert(array[1]); // 2
You are passing back a C# int array, which javascript can't read. Your best bet would be to convert it to JSON and then send it back and parse that with the JavaScript. Another option would be to simply to .ToString() on the array before you return it (or when you bind it) and then parse that with the javascript.
I am working on a file parser, and this bit of code is not giving me what I want. Before I go any farther, I should mention that I did not write this program, I am only editing the source to fix this specific problem. Also, I can compile the code, so that is not a problem (you know how downloaded programs always have compile errors). Here's the code.
case EsfValueType.Binary4E: //System.String[]
{
int size = (int)(this.reader.ReadUInt32() - ((uint)this.reader.BaseStream.Position));
var strings = new string[size / 4];
for (int i = 0; i < size / 4; i++)
strings[i] = this.stringValuesUTF16[this.reader.ReadUInt32()];
esfValue.Value = strings.ToString();
break;
}
Now, I added the .ToString(); part to the above line, but it made no difference. The problem is that esfValue.Value ends up with System.String[] as it's value, and I want the value of the System.String object. If you can make sense out of this and tell me what is wrong, it would be appreciated.
The program name is ESF Editor 1.4.8.0.
case EsfValueType.Binary4E: //System.String[]
{
int size = (int)(this.reader.ReadUInt32() - ((uint)this.reader.BaseStream.Position));
var strings = new StringBuilder();
for (int i = 0; i < size / 4; i++)
{
strings.Append(this.stringValuesUTF16[this.reader.ReadUInt32()]); //or AppendLine, depending on what you need
}
esfValue.Value = strings.ToString();
break;
}
The strings variable is an array of strings - the Array class does not override the default ToString() implementation which returns the type of the object.
You need to concatenate all the strings in the array - either looping and concatenating or using LINQ and assign the resulting string to esfValue.Value. Of course, this assumes you want the values all in one string, one after the other.
Your issue is that strings isn't a single string, its an array of strings. As a result your call to ToString is calling Object.ToString(), which returns the type of the object.
Maybe you want something like
esfValue.Value = strings.Aggregate((acc, next) => acc + next)
which will simply concatenate all the strings together.
When you do a .ToString() on a class that doesn't override the .ToString() base method to return a custom string (which string[] doesn't), you're always going to get the type's namespace/class as the result.
Arrays, in and of themselves, don't have values. What value are you trying to get? Are you trying to join the array into a single, character-delimited string? If so, this would work:
esfValue.Value = string.Join(",", strings);
Just replace the , with whatever character you want to delimit the array with.
I think you just need to join the string values contained in the string array. In order to do so, you need to call String.Join and pass the string separator and the string array. It returns a single System.String.
Hey. I have this javascript file that I'm getting off the web and it consists of basically several large javascript arrays. Since I'm a .net developer I'd like for this array to be accessible through c# so I'm wondering if there are any codeplex contributions or any other methods that I could use to turn the javascript array into a c# array that I could work with from my c# code.
like:
var roomarray = new Array(194);
var modulearray = new Array(2055);
var progarray = new Array(160);
var staffarray = new Array(3040);
var studsetarray = new Array(3221);
function PopulateFilter(strZoneOrDept, cbxFilter) {
var deptarray = new Array(111);
for (var i=0; i<deptarray.length; i++) {
deptarray[i] = new Array(1);
}
deptarray[0] [0] = "a/MPG - Master of Public Governance";
deptarray[0] [1] = "a/MPG - Master of Public Governance";
deptarray[1] [0] = "a/MBA_Flex MBA 1";
deptarray[1] [1] = "a/MBA_Flex MBA 1";
deptarray[2] [0] = "a/MBA_Flex MBA 2";
deptarray[2] [1] = "a/MBA_Flex MBA 2";
deptarray[3] [0] = "a/cand.oecon";
deptarray[3] [1] = "a/cand.oecon";
and so forth
This is what I'm thinking after overlooking the suggestions:
Retrieve the javascript file in my c# code by making an httprequest for it
paste it together with some code i made myself
from c# call an execute on a javascript function selfmade function that will turn the javascript array into json (with help from json.org/json2.js), and output it to a new file
retrieve the new file in c# parsing the json with the DataContractJsonSerializer resulting hopefully resulting in a c# array
does it sound doable to you guys?
I'm not in front of a computer with c# right now so I'm not able to fully try this.
What you're going to need to do #Jakob is the following:
Write a parser that will download the file and store it in memory.
For each section that you want to "parse" into a c# array (for example zonearray), you need to setup bounds to begin searching and end searching the file. Example: We know that zonearray starts building the array the two lines after zonearray[i] = new Array(1); and ends on zonearray.sort().
So with these bounds we can then zip through each line between and parse a C# array. This is simple enough I think that you can figure out. You'll need to keep track of sub-index as well remember.
Repeat this 2-3 for each array you want to parse (zonearray, roomarray..etc).
If you can't quite figure out how to code the bounds or how to parse the line and dump them into arrays, I might be able to write something tomorrow (even though it's a holiday here in Canada).
EDIT: It should be noted that you can't use some JSON parser for this; you have to write your own. It's not really that difficult to do, you just need to break it into small steps (first figure out how to zip through each line and find the right "bounds").
HTH
EDIT: I just spent ~20 minutes writing this up for you. It should parse the file and load each array into a List<string[]>. I've heavily commented it so you can see what's going on. If you have any questions, don't hesitate to ask. Cheers!
private class SearchBound
{
public string ArrayName { get; set; }
public int SubArrayLength { get; set; }
public string StartBound { get; set; }
public int StartOffset { get; set; }
public string EndBound { get; set; }
}
public static void Main(string[] args)
{
//
// NOTE: I used FireFox to determine the encoding that was used.
//
List<string> lines = new List<string>();
// Step 1 - Download the file and dump all the lines of the file to the list.
var request = WebRequest.Create("http://skema.ku.dk/life1011/js/filter.js");
using (var response = request.GetResponse())
using(var stream = response.GetResponseStream())
using(var reader = new StreamReader(stream, Encoding.GetEncoding("ISO-8859-1")))
{
string line = null;
while ((line = reader.ReadLine()) != null)
{
lines.Add(line.Trim());
}
Console.WriteLine("Download Complete.");
}
var deptArrayBounds = new SearchBound
{
ArrayName = "deptarray", // The name of the JS array.
SubArrayLength = 2, // In the JS, the sub array is defined as "new Array(X)" and should always be X+1 here.
StartBound = "deptarray[i] = new Array(1);",// The line that should *start* searching for the array values.
StartOffset = 1, // The StartBound + some number line to start searching the array values.
// For example: the next line might be a '}' so we'd want to skip that line.
EndBound = "deptarray.sort();" // The line to stop searching.
};
var zoneArrayBounds = new SearchBound
{
ArrayName = "zonearray",
SubArrayLength = 2,
StartBound = "zonearray[i] = new Array(1);",
StartOffset = 1,
EndBound = "zonearray.sort();"
};
var staffArrayBounds = new SearchBound
{
ArrayName = "staffarray",
SubArrayLength = 3,
StartBound = "staffarray[i] = new Array(2);",
StartOffset = 1,
EndBound = "staffarray.sort();"
};
List<string[]> deptArray = GetArrayValues(lines, deptArrayBounds);
List<string[]> zoneArray = GetArrayValues(lines, zoneArrayBounds);
List<string[]> staffArray = GetArrayValues(lines, staffArrayBounds);
// ... and so on ...
// You can then use deptArray, zoneArray etc where you want...
Console.WriteLine("Depts: " + deptArray.Count);
Console.WriteLine("Zones: " + zoneArray.Count);
Console.WriteLine("Staff: " + staffArray.Count);
Console.ReadKey();
}
private static List<string[]> GetArrayValues(List<string> lines, SearchBound bound)
{
List<string[]> values = new List<string[]>();
// Get the enumerator for the lines.
var enumerator = lines.GetEnumerator();
string line = null;
// Step 1 - Find the starting bound line.
while (enumerator.MoveNext() && (line = enumerator.Current) != bound.StartBound)
{
// Continue looping until we've found the start bound.
}
// Step 2 - Skip to the right offset (maybe skip a line that has a '}' ).
for (int i = 0; i <= bound.StartOffset; i++)
{
enumerator.MoveNext();
}
// Step 3 - Read each line of the array.
while ((line = enumerator.Current) != bound.EndBound)
{
string[] subArray = new string[bound.SubArrayLength];
// Read each sub-array value.
for (int i = 0; i < bound.SubArrayLength; i++)
{
// Matches everything that is between an equal sign then the value
// wrapped in quotes ending with a semi-colon.
var m = Regex.Matches(line, "^(.* = \")(.*)(\";)$");
// Get the matched value.
subArray[i] = m[0].Groups[2].Value;
// Move to the next sub-item if not the last sub-item.
if (i < bound.SubArrayLength - 1)
{
enumerator.MoveNext();
line = enumerator.Current;
}
}
// Add the sub-array to the list of values.
values.Add(subArray);
// Move to the next line.
if (!enumerator.MoveNext())
{
break;
}
}
return values;
}
If I understand your question right, you are asking whether you can execute JavaScript code from C#, and then pass the result (which in your example would be a JavaScript Array object) into C# code.
The answer is: Of course it’s theoretically possible, but you would need to have an actual JavaScript interpreter to execute the JavaScript. You’ll have to find one or write your own, but given that JavaScript is a full-blown programming language, and writing interpreters for such a large and full-featured programming language is quite an undertaking, I suspect that you won’t find a complete ready-made solution, nor will you be able to write one unless your dedication exceeds that of all other die-hard C#-and-JavaScript fans worldwide.
However, with a bit of trickery, you might be able to coerce an existing JavaScript interpreter to do what you want. For obvious reasons, all browsers have such an interpreter, including Internet Explorer, which you can access using the WinForms WebBrowser control. Thus, you could try the following:
Have your C# code generate an HTML file containing the JavaScript you downloaded plus some JavaScript that turns it into JSON (you appear to have already found something that does this) and outputs it in the browser.
Open that HTML file in the WebBrowser control, have it execute the JavaScript, and then read the contents of the website back, now that it contains the result of the executed JavaScript.
Turn the JSON into a C# array using DataContractJsonSerializer as you suggested.
This is a pretty roundabout way to do it, but it is the best I can think of.
I have to wonder, though, why you are retrieving a JavaScript file from the web in the first place. What generates this JavaScript file? Whatever generates it, surely could generate some properly readable stuff instead (e.g. an XML file)? If it is not generated but written by humans, then why is it written in JavaScript instead of XML, CSV, or some other data format? Hopefully with these thoughts you might be able to find a solution that doesn’t require JavaScript trickery like the above.
Easiest solution is to just execute the Javascript function that makes the array. Include there a function that makes it an JSON (http://www.json.org/js.html). After that make a XMLHttpRequest (AJAX) to the server and from there extract the JSON to a custom class.
If I may use jQuery, here's an example of the needed Javascript:
var myJSONText = JSON.stringify(deptarray);
(function($){
$.ajax({
type: "POST",
url: "some.aspx",
data: myJSONText,
success: function(msg){
alert( "Data Saved: " + msg );
}
});
})(jQuery);
Only now need some code to rip the JSON string to an C# Array.
EDIT:
After looking around a bit, I found Json.NET: http://json.codeplex.com/
There are also a lot of the same questions on Stackoverflow that ask the same.