Hide ‘AddButton’/‘Plus (+) Button’ and ‘Delete Buttons’ In CRM 2015 Subgrid

When we have a requirement to remove sub-grid buttons, there are two supported ways to do that.

• Hide through Security Role (which in most cases this is not possible)
• Hide using Ribbon Workbench (this did not worked for me and many developers had face the same issue.)

I was not able to use both and because of that I used the unsupported way(custom JavaScript command) to hide the add and delete buttons in sub-grid.

function hideAddRemoveButtonSubgrid() {
    try {
        // Hide add/remove buttons
        addEventToGridRefresh(setAddButtonDisplayNone);
    }
    catch (e) {

    }
}

var gridId = "grid_components";

function setAddButtonDisplayNone() {
    // Hide Add Button
    var addImage = document.getElementById(gridId + "_addImageButton");
    if (addImage) {
        addImage.style.display = 'none';
    }

    // Hide delete buttons
    var cont = true;
    var i = 0;
    while (cont) {
        var deleteButtionId = "gridBodyTable_gridDelBtn_" + i;
        var deleteButtion = document.getElementById(deleteButtionId);
        if (deleteButtion) {
            deleteButtion.style.display = 'none';
        }
        else {
            cont = false;
        }

        i++;
    }

}

function addEventToGridRefresh(functionToCall) {
    // retrieve the subgrid
    var grid = document.getElementById(gridId);
    // if the subgrid still not available we try again after 1 second
    if (grid == null) {
        setTimeout(function () { addEventToGridRefresh(functionToCall); }, 1000);
        return;
    }

    // add the function to the onRefresh event
    grid.control.add_onRefresh(functionToCall);

    var addImage = document.getElementById(gridId + "_addImageButton");
    if (addImage) {
        if (addImage.style.display.toLowerCase() == "block") {
            setAddButtonDisplayNone();
        }
    }
}

And finally add a page event handler to call the method "hideAddRemoveButtonSubgrid" in page load event. 

This hide the add button for the given grid, and will hide all the delete buttons in all the grids in the page.

Ref : http://missdynamicscrm.blogspot.com/2015/11/hide-add-existing-button-or-plus-button-subgrid-crm.html