KendoGrid.cs

public class KendoGrid
{
    private readonly string gridId;
    private readonly IJavaScriptExecutor driver;

    public KendoGrid(IWebDriver driver, IWebElement gridDiv)
    {
        this.gridId = gridDiv.GetAttribute("id");
        this.driver = (IJavaScriptExecutor)driver;
    }

    public void RemoveFilters()
    {
        string jsToBeExecuted = this.GetGridReference();
        jsToBeExecuted = string.Concat(jsToBeExecuted, "grid.dataSource.filter([]);");
        this.driver.ExecuteScript(jsToBeExecuted);
    }

    public int TotalNumberRows()
    {
        string jsToBeExecuted = this.GetGridReference();
        jsToBeExecuted = string.Concat(jsToBeExecuted, "grid.dataSource.total();");
        var jsResult = this.driver.ExecuteScript(jsToBeExecuted);
        return int.Parse(jsResult.ToString());
    }

    public void Reload()
    {
        string jsToBeExecuted = this.GetGridReference();
        jsToBeExecuted = string.Concat(jsToBeExecuted, "grid.dataSource.read();");
        this.driver.ExecuteScript(jsToBeExecuted);
    }

    public int GetPageSize()
    {
        string jsToBeExecuted = this.GetGridReference();
        jsToBeExecuted = string.Concat(jsToBeExecuted, "return grid.dataSource.pageSize();");
        var currentResponse = this.driver.ExecuteScript(jsToBeExecuted);
        int pageSize = int.Parse(currentResponse.ToString());
        return pageSize;
    }

    public void ChangePageSize(int newSize)
    {
        string jsToBeExecuted = this.GetGridReference();
        jsToBeExecuted = string.Concat(jsToBeExecuted, "grid.dataSource.pageSize(", newSize, ");");
        this.driver.ExecuteScript(jsToBeExecuted);
    }

    public void NavigateToPage(int pageNumber)
    {
        string jsToBeExecuted = this.GetGridReference();
        jsToBeExecuted = string.Concat(jsToBeExecuted, "grid.dataSource.page(", pageNumber, ");");
        this.driver.ExecuteScript(jsToBeExecuted);
    }

    public void Sort(string columnName, SortType sortType)
    {
        string jsToBeExecuted = this.GetGridReference();
        jsToBeExecuted = string.Concat(jsToBeExecuted, "grid.dataSource.sort({field: '", columnName, "', dir: '", sortType.ToString().ToLower(), "'});");
        this.driver.ExecuteScript(jsToBeExecuted);
    }

    public List<T> GetItems<T>() where T : class
    {
        string jsToBeExecuted = this.GetGridReference();
        jsToBeExecuted = string.Concat(jsToBeExecuted, "return JSON.stringify(grid.dataSource.data());");
        var jsResults = this.driver.ExecuteScript(jsToBeExecuted);
        var items = JsonConvert.DeserializeObject<List<T>>(jsResults.ToString());
        return items;
    }

    public void Filter(string columnName, FilterOperator filterOperator, string filterValue)
    {
        this.Filter(new GridFilter(columnName, filterOperator, filterValue));
    }

    public void Filter(params GridFilter[] gridFilters)
    {
        string jsToBeExecuted = this.GetGridReference();
        StringBuilder sb = new StringBuilder();
        sb.Append(jsToBeExecuted);
        sb.Append("grid.dataSource.filter({ logic: \"and\", filters: [");
        foreach (var currentFilter in gridFilters)
        {
            DateTime filterDateTime;
            bool isFilterDateTime = DateTime.TryParse(currentFilter.FilterValue, out filterDateTime);
            string filterValueToBeApplied =
                                            isFilterDateTime ? string.Format("new Date({0}, {1}, {2})", filterDateTime.Year, filterDateTime.Month - 1, filterDateTime.Day) :
                                            string.Format("\"{0}\"", currentFilter.FilterValue);
            string kendoFilterOperator = this.ConvertFilterOperatorToKendoOperator(currentFilter.FilterOperator);
            sb.Append(string.Concat("{ field: \"", currentFilter.ColumnName, "\", operator: \"", kendoFilterOperator, "\", value: ", filterValueToBeApplied, " },"));
        }
        sb.Append("] });");
        jsToBeExecuted = sb.ToString().Replace(",]", "]");
        this.driver.ExecuteScript(jsToBeExecuted);
    }

    public int GetCurrentPageNumber()
    {
        string jsToBeExecuted = this.GetGridReference();
        jsToBeExecuted = string.Concat(jsToBeExecuted, "return grid.dataSource.page();");
        var result = this.driver.ExecuteScript(jsToBeExecuted);
        int pageNumber = int.Parse(result.ToString());
        return pageNumber;
    }

    private string GetGridReference()
    {
        string initializeKendoGrid = string.Format("var grid = $('#{0}').data('kendoGrid');", this.gridId);

        return initializeKendoGrid;
    }

    private string ConvertFilterOperatorToKendoOperator(FilterOperator filterOperator)
    {
        string kendoFilterOperator = string.Empty;
        switch (filterOperator)
        {
            case FilterOperator.EqualTo:
                kendoFilterOperator = "eq";
                break;
            case FilterOperator.NotEqualTo:
                kendoFilterOperator = "neq";
                break;
            case FilterOperator.LessThan:
                kendoFilterOperator = "lt";
                break;
            case FilterOperator.LessThanOrEqualTo:
                kendoFilterOperator = "lte";
                break;
            case FilterOperator.GreaterThan:
                kendoFilterOperator = "gt";
                break;
            case FilterOperator.GreaterThanOrEqualTo:
                kendoFilterOperator = "gte";
                break;
            case FilterOperator.StartsWith:
                kendoFilterOperator = "startswith";
                break;
            case FilterOperator.EndsWith:
                kendoFilterOperator = "endswith";
                break;
            case FilterOperator.Contains:
                kendoFilterOperator = "contains";
                break;
            case FilterOperator.NotContains:
                kendoFilterOperator = "doesnotcontain";
                break;
            case FilterOperator.IsAfter:
                kendoFilterOperator = "gt";
                break;
            case FilterOperator.IsAfterOrEqualTo:
                kendoFilterOperator = "gte";
                break;
            case FilterOperator.IsBefore:
                kendoFilterOperator = "lt";
                break;
            case FilterOperator.IsBeforeOrEqualTo:
                kendoFilterOperator = "lte";
                break;
            default:
                throw new ArgumentException("The specified filter operator is not supported.");
        }

        return kendoFilterOperator;
    }
}