提交之前的图像预览在IE 9和Safari 5.x中不起作用 [英] Image Preview before submit doesn't work in IE 9 and Safari 5.x

问题描述

我正在尝试在所选图片的客户端上进行图片预览，然后用户点击提交按钮。

I'm currently trying to make an image preview on the client side of selected image, before the user clicks on a submit button.

我发现这个方法在这里在论坛：

I've found this approach here in the forum:

function selectedPhotoText(input) {
    if (input.files && input.files[0]) {
        var reader = new FileReader();

        reader.onload = function (e) {
            $('#imagePreview')
                        .attr('src', e.target.result)
                        .width(240)
                        .height(149);
        };

        reader.readAsDataURL(input.files[0]);
    }
    else {
        $('#imagePreview').attr('src', "../../Images/blqblq.jpg");
    }
}

<img id="imagePreview" class="img-border" src="../../Images/blqblq.jpg" alt="Selected Image"/>

和文件上传控制：

and the file upload control:

<asp:FileUpload ID="uploadPhotoDialog" onchange="selectedPhotoText(this)" runat="server"/>

这种方法在Chrome，Firefox和Opera中运行良好。是否有任何IE和Safari的变通办法？

This approach works fine in Chrome, Firefox and Opera. Is there any workarounds for IE and Safari?

提前致谢！

Thanks in advance!

推荐答案

5.XX和IE到9.xx的Safari不支持FileReader。
看这个。
http://caniuse.com/filereader

Safari to 5.X.X and IE to 9.x.x doesnt support FileReader. Look this. http://caniuse.com/filereader

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