js代码:
function imgYL() { var preview = document.querySelector('#imgPhoto'); var file = document.querySelector('#FileUpload3').files[0]; var reader = new FileReader(); reader.onloadend = function () { preview.src = reader.result; } if (file) { reader.readAsDataURL(file); } else { preview.src = ""; } }
html代码:
<asp:Image ID="imgPhoto" runat="server" Style="height: 100px; 100px;" onerror="javascript:this.src='/UploadFiles/Map/timg.jpg';" />
<asp:FileUpload ID="FileUpload3" runat="server" onchange="imgYL();" />