From 2dca6625b63e1283eee73b72f2404a11bb022312 Mon Sep 17 00:00:00 2001
From: Eric Rosenfeld <46537274+r0si@users.noreply.github.com>
Date: Fri, 1 Nov 2019 18:20:56 +0100
Subject: [PATCH] added 2nd input element

[*] second hidden input element
[*] added a js function to call the click on the hidden input element - this can be done by any custom button
---
 BlazorInputFile/InputFile.razor      | 13 ++++++++++++-
 BlazorInputFile/wwwroot/inputfile.js |  4 ++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/BlazorInputFile/InputFile.razor b/BlazorInputFile/InputFile.razor
index 0b37811..b981a2e 100644
--- a/BlazorInputFile/InputFile.razor
+++ b/BlazorInputFile/InputFile.razor
@@ -1,7 +1,14 @@
 @implements IDisposable
 @inject IJSRuntime JSRuntime
 
-<input type="file" @ref="inputFileElement" @attributes="UnmatchedParameters" />
+@if (IsElementHidden)
+{
+    <input id="@ElementId" type="file" @ref="inputFileElement" @attributes="UnmatchedParameters" style="display:none;"/>
+}
+else
+{
+    <input type="file" @ref="inputFileElement" @attributes="UnmatchedParameters" />
+}
 
 @code {
     [Parameter(CaptureUnmatchedValues = true)] public Dictionary<string, object> UnmatchedParameters { get; set; }
@@ -9,6 +16,10 @@
     [Parameter] public int MaxMessageSize { get; set; } = 20 * 1024; // TODO: Use SignalR default
     [Parameter] public int MaxBufferSize { get; set; } = 1024 * 1024;
 
+
+    [Parameter] public string ElementId { get; set; } // this id is used by the js function 'wrapInput' which calls click()
+    [Parameter] public bool IsElementHidden { get; set; } = false;
+
     ElementReference inputFileElement;
     IDisposable thisReference;
 
diff --git a/BlazorInputFile/wwwroot/inputfile.js b/BlazorInputFile/wwwroot/inputfile.js
index 13e7ab3..a714a6b 100644
--- a/BlazorInputFile/wwwroot/inputfile.js
+++ b/BlazorInputFile/wwwroot/inputfile.js
@@ -63,6 +63,10 @@
             destinationUint8Array.set(sourceUint8Array, destinationOffset);
 
             return bytesToRead;
+        },
+
+        wrapInput: function wrapInput(elementId) {
+            document.getElementById(elementId).click();
         }
     };