UltraWebGrid根据单元格文字长度自适应列宽

        function textSize(fontSize, text) {
            var span = document.createElement("span");
            var result = {};
            result.width = span.offsetWidth;
            result.height = span.offsetWidth;
            span.style.fontSize = fontSize
            span.style.visibility = "hidden";
            document.body.appendChild(span);
            if (typeof span.textContent != "undefined")
                span.textContent = text;
            else span.innerText = text;
            result.width = span.offsetWidth - result.width;
            result.height = span.offsetHeight - result.height;
            span.parentNode.removeChild(span);
            return result;
        }

首先上面是一个根据字号来算出一串文本宽度的函数,UltraWebGrid默认的Font-Size 是8.25pt,另外还有left padding 3的偏移,算的时候加上3，效果不明显，所以加了5，至于字号大家可以自己设置的，函数里自己替换就可以了,下面是具体的设置列宽的函数了(为UltraWebGrid初始化函数),思路是这样的,找出该列中最长的文本宽度加上5个像素的偏移量,然后再设置成该列的宽度:)

        function Grid_InitializeLayoutHandler(gridName) {
            var grid = igtbl_getGridById(gridName);
            var columnCount = grid.Bands[0].Columns.length;
            var rowCount = grid.Rows.length;
            if (grid && row) {
                for (var i = 1; i < columnCount; i++) {
                    for (var j = 0; j < rowCount; j++) {
                        var cellValue = grid.Rows.getRow(j).getCell(i).getValue();
                        var getWidth = textSize("8.25pt", cellValue).width;
                        if (!cellValue)
                            continue;
                        var colWidth = 0;
                        if (getWidth) {
                            if (getWidth > colWidth)
                                colWidth = getWidth;
                        }
                        grid.Bands[0].Columns[i].setWidth(colWidth + 5);
                    }
                }
            }
}