Easyui Datagrid相同连续列合并扩展（一）

一.autoMergeCellAndCells实现效果

function onLoadSuccess(data){
	$(this).datagrid("autoMergeCellAndCells",['productid','productname']);
}

　　二.autoMergeCells实现效果

function onLoadSuccess(data){
         $(this).datagrid("autoMergeCells",['productid','productname']);
 }

三.扩展

$.extend($.fn.datagrid.methods, {
    autoMergeCells : function (jq, fields) {
        return jq.each(function () {
            var target = $(this);
            if (!fields) {
                fields = target.datagrid("getColumnFields");
            }
            var rows = target.datagrid("getRows");
            var i = 0,
            j = 0,
            temp = {};
            
            for (i; i < rows.length; i++) {
                var row = rows[i];
                j = 0;
                for (j; j < fields.length; j++) {
                    var field = fields[j];
                    var tf = temp[field];
                    if (!tf) {
                        tf = temp[field] = {};
                        tf[row[field]] = [i];
                    } else {
                        var tfv = tf[row[field]];
                        if (tfv) {
                            tfv.push(i);
                        } else {
                            tfv = tf[row[field]] = [i];
                        }
                    }
                }
            }
            $.each(temp, function (field, colunm) {
                $.each(colunm, function () {
                    var group = this;
                    
                    if (group.length > 1) {
                        var before,
                        after,
                        megerIndex = group[0];
                        for (var i = 0; i < group.length; i++) {
                            before = group[i];
                            after = group[i + 1];
                            if (after && (after - before) == 1) {
                                continue;
                            }
                            var rowspan = before - megerIndex + 1;
                            if (rowspan > 1) {
                                target.datagrid('mergeCells', {
                                    index : megerIndex,
                                    field : field,
                                    rowspan : rowspan
                                });
                            }
                            if (after && (after - before) != 1) {
                                megerIndex = after;
                            }
                        }
                    }
                });
            });
        });
    },
    autoMergeCellAndCells : function (jq, fields) {
        return jq.each(function () {
            var target = $(this);
            if (!fields) {
                fields = target.datagrid("getColumnFields");
            }
            var cfield = fields[0];
            if (!cfield) {
                return;
            }
            var rows = target.datagrid("getRows");
            var i = 0,
            j = 0,
            temp = {};
            for (i; i < rows.length; i++) {
                var row = rows[i];
                j = 0;
                var tf = temp[cfield];
                if (!tf) {
                    tf = temp[cfield] = {};
                    tf[row[cfield]] = [i];
                
                } else {
                    var tfv = tf[row[cfield]];
                    if (tfv) {
                        tfv.push(i);
                    } else {
                        tfv = tf[row[cfield]] = [i];
                        
                    }
                }
            }
            
            $.each(temp, function (field, colunm) {
                $.each(colunm, function () {
                    var group = this;
                    
                    if (group.length > 1) {
                        var before,
                        after,
                        megerIndex = group[0];
                        for (var i = 0; i < group.length; i++) {
                            before = group[i];
                            after = group[i + 1];
                            if (after && (after - before) == 1) {
                                continue;
                            }
                            var rowspan = before - megerIndex + 1;
                            if (rowspan > 1) {
                                for(var j=0;j<fields.length;j++){
                                    target.datagrid('mergeCells', {
                                        index : megerIndex,
                                        field : fields[j],
                                        rowspan : rowspan
                                   });
                                }
                            }
                            if (after && (after - before) != 1) {
                                megerIndex = after;
                            }
                        }
                    }
                });
            });
        });
    }
    
});