要添加批注到表单， 首先需要创建一个批注并设置， 然后使用 add 方法来将批注设置到表单中的某个单元格。例如：
如果你需要移除已经添加的批注，请使用以下的方法：
当你添加批注到一个单元格后， 你可以使用 get 方法来获取单个单元格上的批注，或者使用 all 方法来获取表单上的所有批注。
window.onload = function () {
var spread = new GC.Spread.Sheets.Workbook(document.getElementById("ss"));
initSpread(spread);
};
function initSpread(spread) {
var sheet = spread.getSheet(0);
sheet.addSpan(1, 1, 1, 6);
sheet.setValue(1, 1, "there is a comment on the upper right corner of the cell");
sheet.comments.add(1, 1, "new comment!");
document.getElementById("btnAddComment").addEventListener('click',function () {
var row = parseInt(document.getElementById("txtRowIndex").value);
var col = parseInt(document.getElementById("txtColumnIndex").value);
var spreadNS = GC.Spread.Sheets;
var sheet = spread.getSheet(0);
sheet.setValue(row, col, 'new comment');
var text = document.getElementById("txtComment").value;
sheet.comments.add(row, col, text);
})
};
<!doctype html>
<html style="height:100%;font-size:14px;">
<head>
<meta name="spreadjs culture" content="zh-cn" />
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" type="text/css"
href="$DEMOROOT$/zh/purejs/node_modules/@grapecity-software/spread-sheets/styles/gc.spread.sheets.excel2013white.css">
<script src="$DEMOROOT$/zh/purejs/node_modules/@grapecity-software/spread-sheets/dist/gc.spread.sheets.all.min.js"
type="text/javascript"></script>
<script
src="$DEMOROOT$/zh/purejs/node_modules/@grapecity-software/spread-sheets-resources-zh/dist/gc.spread.sheets.resources.zh.min.js"
type="text/javascript"></script>
<script src="$DEMOROOT$/spread/source/js/license.js" type="text/javascript"></script>
<script src="app.js" type="text/javascript"></script>
<link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
<div class="sample-tutorial">
<div id="ss" class="sample-spreadsheets"></div>
<div class="options-container">
<div class="option-row">
<label for="txtRowIndex">Row index:</label>
<input id="txtRowIndex" type="text" value="5" />
</div>
<div class="option-row">
<label for="txtColumnIndex">Column index:</label>
<input id="txtColumnIndex" type="text" value="2" />
</div>
<div class="option-row">
<label for="txtComment">Comment text:</label>
<input id="txtComment" type="text" value="comment demo" />
</div>
<div class="option-row">
<input type="button" id="btnAddComment" value="AddComment" />
</div>
</div>
</div>
</body>
</html>
.sample-tutorial {
position: relative;
height: 100%;
overflow: hidden;
}
.sample-spreadsheets {
width: calc(100% - 280px);
height:100%;
overflow: hidden;
float: left;
}
.options-container {
float: right;
width: 280px;
overflow: auto;
padding: 12px;
height: 100%;
box-sizing: border-box;
background: #fbfbfb;
}
label {
display: inline-block;
min-width: 90px;
margin: 6px 0;
}
input {
padding: 4px 6px;
box-sizing: border-box;
margin-bottom: 6px;
}
body {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
