I am currently facing an issue with displaying data in a ListView control in my LabWindows CVI 2015 project. The ListView remains empty, and I am receiving the following error message when attempting to add an image to the ImageList:
Error adding the image to the ImageList.
Despite following the standard procedure for adding data and configuring the ListView, the items do not appear as expected. Below is my code:
#include "mscomctl.h"#include <userint.h>#include <cviauto.h>#include <ansi_c.h>#include "Interface.h"// Global variable declarationsCAObjHandle listViewHandle = 0;CAObjHandle imageListHandle = 0; CAObjHandle listItems = 0;CAObjHandle listItem = 0;VARIANT imagePathVariant;VARIANT itemText;VARIANT itemIndex;VARIANT imageVariant;VARIANT imageVariant1; VARIANT imageVariant2; MSControlsObj_IImage imageObj; // Declaration to store the image object// Image pathconst char *imagePath = "C:\\Users\\X425\\Desktop\\test\\image1.jpg";int main(int argc, char *argv[]) { int panelHandle = LoadPanel(0, "Interface.uir", PANEL); if (panelHandle < 0) { printf("Error: Unable to load the panel.\n"); return -1; } // Get the ActiveX control handle for the ListView int status = GetObjHandleFromActiveXCtrl(panelHandle, PANEL_LISTVIEW, &listViewHandle); if (status < 0) { printf("Error: Unable to get the ActiveX handle for the ListView.\n"); DiscardPanel(panelHandle); return -1; } // Set the ListView to icon view mode MSControls_SetIListViewProperty(listViewHandle, NULL, MSControls_IListViewView, CAVT_LONG, MSControlsConst_lvwIcon); // Create an ImageList status = GetObjHandleFromActiveXCtrl(panelHandle, PANEL_IMAGELIST, &imageListHandle); if (status < 0) { printf("Error: Unable to get the ActiveX handle for the ImageList.\n"); DiscardPanel(panelHandle); return -1; } // Ensure the ImageList is valid if (imageListHandle == 0) { printf("Error: The ImageList is not valid.\n"); DiscardPanel(panelHandle); return -1; } // Add the image to the ImageList CA_VariantSetInt(&imageVariant1, 1); // index (should be an integer) CA_VariantSetInt(&imageVariant2, 0); // key (should be an integer) // Encapsulate the image path in a VARIANT as a string CA_VariantSetCString(&imagePathVariant, imagePath); // Call MSControls_IImagesAdd HRESULT hr = MSControls_IImagesAdd(imageListHandle, NULL, imageVariant1, imageVariant2, imagePathVariant, &imageObj); if (FAILED(hr)) { printf("Error adding the image to the ImageList. HRESULT: 0x%08X\n", hr); DiscardPanel(panelHandle); return -1; } // Check if the image was successfully added printf("Image successfully added.\n"); // Associate the ImageList with the ListView MSControls_SetIListViewProperty(listViewHandle, NULL, MSControls_IListViewIcons, CAVT_OBJHANDLE, imageListHandle); // Encapsulate the image index in a VARIANT (indices start at 1) CA_VariantSetInt(&imageVariant, 1); // Add items with the image MSControls_GetIListViewProperty(listViewHandle, NULL, MSControls_IListViewListItems, CAVT_OBJHANDLE, &listItems); if (listItems) { for (int i = 1; i <= 5; i++) { // Example: 5 items CA_VariantSetCString(&itemText, "Item"); CA_VariantSetInt(&itemIndex, i); MSControls_IListItemsAdd(listItems, NULL, itemIndex, CA_DEFAULT_VAL, itemText, imageVariant, CA_DEFAULT_VAL, &listItem); } } // Display the panel DisplayPanel(panelHandle); RunUserInterface(); // Clean up resources DiscardPanel(panelHandle); CA_DiscardObjHandle(listViewHandle); CA_DiscardObjHandle(imageListHandle); CA_DiscardObjHandle(listItems); CA_DiscardObjHandle(listItem); CA_VariantClear(&imagePathVariant); CA_VariantClear(&itemText); CA_VariantClear(&itemIndex); CA_VariantClear(&imageVariant); return 0;}After running this code, I configure the ListView and try adding items, but the ListView remains empty.
I searched the web for documentation or a user manual on the Microsoft ListView 6.0 library to help resolve this issue but was unable to find any relevant resources.