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We get these test results when we execute the code: Array Before: one, two, three Array After: oneCHANGED, twoCHANGED, threeCHANGED Press any key to exit C-style arrays that are not packaged as a SAFEARRAY can also be marshaled between .NET and COM. These arrays are less frequently used in COM since languages such as Visual Basic 6.0 (VB6) don t have much built-in support for them. We can define a COM method that uses a C-style array like this: [id(15), helpstring("method UseCStyleArray")] HRESULT UseCStyleArray( [in, length_is(arraySize), size_is(arraySize)] long inParam[], [in] long arraySize, [in,out] BSTR* outParam); Notice the inclusion of the length_is and size_is Microsoft Interface Definition Language (MIDL) attributes. These attributes are needed in order to provide COM with the size of the array that it must marshal. Here is the C++ implementation of this method: STDMETHODIMP CDniDataTypesObj::UseCStyleArray(long inParam[], long arraySize, BSTR* outParam) { //use a C-style array. Copy the input //values in the array into a BSTR and return it _bstr_t buffer; for(int i = 0; i < arraySize; i++) { buffer += _bstr_t(inParam[i]); } *outParam = buffer; return S_OK; } The output from this method is a concatenation of the strings in the input array. This C# code calls the COM method: using System; using System.Runtime.InteropServices; using DniDataTypesLib; namespace ComSafeArrays { class ComSafeArraysTest { static void Main(string[] args) { split pdf using c# Best 20 NuGet pdf-to-image Packages - NuGet Must Haves Package
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This tutorial will show you how to split a PDF file into pages with ByteScout PDF Extractor SDK in C#, C++, VB.NET, and VBScript. There are various ways to split ... "); If all you wanted to do was read tags and display their values the loop could end right here, but instead the sketch goes on to search its internal tag database for this particular tag to see if it can be identified Searching the tag database is done using the findTag function that will be explained in a moment At this point, all you need to know is that findTag will return an integer value greater than 1 if the tag was found, or 0 if it wasn t found int tagId = findTag( tagValue ); We only want the door to unlock if the scanned tag was found in the database, so the sketch checks whether the previous function returned a value greater than 0. birt code 39, birt barcode4j, word ean 13 barcode, birt data matrix, birt code 128, word pdf 417 c# pdf split merge split PDF into multiple files in C# - Stack Overflow
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May 3, 2018 · Create a command line program in C# that can convert a PDF document into a series of images, one for each page of the document. //create an instance of the COM object DniDataTypesObj comObj = new DniDataTypesObj(); string desc = string.Empty; //call a COM method that uses a C-style array instead //of a safearray int[] intArray = new int[3]; intArray[0] = 111; intArray[1] = 222; intArray[2] = 333; string outParam = string.Empty; //allocate unmanaged memory to pass the array int memSize = Marshal.SizeOf( typeof(Int32)) * intArray.Length; IntPtr arrayPtr = Marshal.AllocCoTaskMem(memSize); //copy the array into the unmanaged memory Marshal.Copy(intArray, 0, arrayPtr, intArray.Length); //make the COM method call comObj.UseCStyleArray(arrayPtr, intArray.Length, ref outParam); //free the memory that we allocated Marshal.FreeCoTaskMem(arrayPtr); Console.WriteLine("C-Style Array: {0},{1},{2},{3}", intArray[0],intArray[1],intArray[2],outParam); //wait for input Console.WriteLine("Press any key to exit"); Console.Read(); } } } Calling this method takes a bit more work on our part. After populating the array we want to pass to the COM method, we allocate unmanaged memory for the array using Marshal. AllocCoTaskMem. This allocates memory that COM is capable of using directly. We then copy the managed array into the allocated memory using Marshal.Copy. Now we are ready to make the COM call, and we do this by passing the IntPtr containing the address of the allocated memory. When the call completes, we remember to free the memory that we allocated using Marshal.FreeCoTaskMem. When the code is executed, we get these results: C-Style Array: 111,222,333,111222333 Press any key to exit c# pdf split merge Splitting and Merging Pdf Files in C# Using iTextSharp (Example)
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May 22, 2012 · We get a decent amount of people who ask us about dynamically splitting a PDF. Splitting a PDF document using DynamicPDF Merger for . If so, it sends some status information to the host so you know it s opening the lock along with the ID number of that tag in its internal database if( tagId > 0 ) { Serialprint("Authorized tag ID "); Serialprint(tagId); Serialprint(": unlocking for "); Because we want it to not just list the numeric ID of the tag but also give the name of the person that tag was assigned to, it then does a lookup in the tagName array defined at the top of the sketch to find the name that matches this ID Because the tagName array elements are numbered from 0 up, rather than from 1 up, we need to subtract 1 from the tagId value to find the matching element in the array Serial. All we need to do now is write a simple COM client to access the component. To do this, we need to know the name of the COM class that was generated. The COM class name (the coclass in COM lingo) is the same as the C# class name, DniNetSimpleNumbersDisp. As shown in the following example code, the full name that is used when creating an instance of this class is prefixed with the namespace name (DniNetSimpleNumbers). The generated class interface is the class name with a leading underscore (_). In this example, the interface name generated is _DniNetSimpleNumbersDisp. However, since we are using late binding, we don t actually reference the interface in the example client code. FogBugz users can turn posts into cases and take other actions that I ll discuss later in this chapter.. c# split pdf itextsharp C# PDF Split SDK: Split, separate PDF file pages into multiple ones ...
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