Display Image Button Not Working In Javascript Help

It is not HELPFUL to me. Please help.

Code looks fine. You need to verify if base64 is correct.

Also check Console in Browser for any JavaScript error

Here is my base64string code PLEASE HELP me check if its correct:

<script>
    function Identify() 
    {
        let FstName = document.getElementsByName("FirstName")[0].value;
        let LstName = document.getElementsByName("LastName")[0].value;
        let CompCode = document.getElementsByName("CompnyCode")[0].value;
        let DeptCode = document.getElementsByName("DeptmentCode")[0].value;
        let IdentCode = document.getElementsByName("IdentificationKey")[0].value;
        let WorkerIdentNo = FstName + "." + LstName + "." + CompCode + "." + DeptCode + "." + IdentCode;
        document.getElementsByName("WorkerIdNo")[0].value = WorkerIdentNo
        return false;
    }
   
     let imageByteArray = [];
    function processImage() {
        const fileInput = document.getElementById("imageInput");
        const OutputBox = document.getElementById("TextArea1");
        const file = fileInput.files[0];
        if (!file) {
            OutputBox.value = 'Please select an image file first.';
            return;
        }
        const reader = new FileReader();
        reader.readAsArrayBuffer(file);
        reader.onloadend = (event) => {
            if (event.target.readyState === FileReader.DONE) {
                const arrayBuffer = event.target.result;
                const U8Array = new Uint8Array(arrayBuffer);
                imageByteArray = Array.from(U8Array);
                const base64String = btoa(String.fromCharCode(...U8Array));
                OutputBox.value = base64String;

            }
        };
    }
     

</script>
<div class="row">
    <div class="col-md-4">
        <form asp-action="WorkerIdentification">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="FirstName" class="control-label"></label>
                <input asp-for="FirstName" class="form-control" name="FirstName" />
                <span asp-validation-for="FirstName" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="LastName" class="control-label"></label>
                <input asp-for="LastName" class="form-control" name="LastName" />
                <span asp-validation-for="LastName" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="WorkerImage" class="control-label"></label>
                <textarea asp-for="WorkerImage" id="TextArea1" rows="5" cols="100" style="overflow:scroll"></textarea>
                <span asp-validation-for="WorkerImage" class="text-danger"></span>
            </div><br />
            <input type="file" id="imageInput" accept="image/*"  />
            <input type="submit" id="convertToByte" value="Convert" class="btn btn-primary" onclick="return processImage()" />
            <div class="form-group">
                <label asp-for="CompnyCode" class="control-label"></label>
                <input asp-for="CompnyCode" class="form-control" name="CompnyCode" />
                <span asp-validation-for="CompnyCode" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="DeptmentCode" class="control-label"></label>
                <input asp-for="DeptmentCode" class="form-control" name="DeptmentCode" />
                <span asp-validation-for="DeptmentCode" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="IdentificationKey" class="control-label"></label>
                <input asp-for="IdentificationKey" class="form-control" value="@ViewBag.WorkerIdKeyNo" name="IdentificationKey" />
                <span asp-validation-for="IdentificationKey" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="WorkerIdNo" class="control-label"></label>
                <input asp-for="WorkerIdNo" class="form-control" name="WorkerIdNo" />
                <span asp-validation-for="WorkerIdNo" class="text-danger"></span>
            </div><br />
            <div class="form-group">
                <input type="submit" value="Identify" name="identify" onclick="return Identify()" class="btn btn-primary" />
                <input type="submit" value="Reposit" class="btn btn-primary" />
            </div>
        </form>
    </div>
</div>

<div>
   
</div>

@section Scripts {
    @{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}

What issue you are facing here?