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docs(tooltip): Fix broken example #1850

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Jan 11, 2024
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docs(tooltip): Fix broken example #1850

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38 changes: 21 additions & 17 deletions knowledge-base/tooltip-in-grid.md
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Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,7 @@ This KB article answers the following question:
<GridColumn Field="@(nameof(Employee.Name))" Title="Employee Name">
<Template>
@{
Employee employee = context as Employee;
Employee employee = (Employee)context;
<span data-employeeId="@employee.Id" class="tooltip-target">@employee.Name</span>
}
</Template>
Expand All @@ -45,18 +45,19 @@ This KB article answers the following question:
</TelerikGrid>

<TelerikTooltip TargetSelector=".tooltip-target"
Width="250px" Height="250px" Position="@TooltipPosition.Right">
Width="250px" Height="250px"
Position="@TooltipPosition.Right">
<Template Context="ttipContext">
<h6>Employee Details</h6>
<hr />
@{
// in a real app, add defensive checks here or extract into a separate component
// the key names is the data attribute, lowercase
int EmployeeId = int.Parse(ttipContext.DataAttributes?["employeeid"]);
int EmployeeId = int.Parse(ttipContext.DataAttributes?["employeeid"] ?? string.Empty);

var EmployeeDetailsData = GetEmplyeeDetails(EmployeeId);

<div style="float:left; margin-left: 20px;">
<div>
<p><strong>Name</strong>: @EmployeeDetailsData.Name</p>
<p><strong>Team</strong>: @EmployeeDetailsData.Team</p>
<p><strong>Salary</strong>: $@EmployeeDetailsData.Salary</p>
Expand All @@ -69,25 +70,28 @@ This KB article answers the following question:
</TelerikTooltip>

@code {
private List<Employee> GridData { get; set; }
private List<Employee> GridData { get; set; } = new();

// This shows that the Tooltip will work even if the Grid is bound after the Tooltip is initialized.
protected override async Task OnAfterRenderAsync(bool firstRender)
{
GridData = await GetEmployees();
StateHasChanged();
if (firstRender)
{
GridData = await GetEmployees();
StateHasChanged();
}
}

private async Task<List<Employee>> GetEmployees()
{
if (GridData == null)
if (GridData == null || !GridData.Any())
{
GridData = Enumerable.Range(1, 90).Select(x => new Employee
{
Id = x,
Name = "name " + x,
Team = "team " + x % 5,
}).ToList();
{
Id = x,
Name = "name " + x,
Team = "team " + x % 5,
}).ToList();
}

return await Task.FromResult(GridData);
Expand All @@ -96,7 +100,7 @@ This KB article answers the following question:
private Employee GetEmplyeeDetails(int employeeId)
{
Random rnd = new Random();
Employee employee = GridData.Where(empl => empl.Id == employeeId).FirstOrDefault();
Employee employee = GridData.First(empl => empl.Id == employeeId);
employee.Salary = rnd.Next(1000, 5000);
employee.ActiveProjects = rnd.Next(2, 10);
employee.HireDate = DateTime.Now.AddYears(-rnd.Next(1, 10)).AddMonths(-rnd.Next(0, 10)).AddDays(-rnd.Next(0, 10));
Expand All @@ -107,11 +111,11 @@ This KB article answers the following question:
public class Employee
{
public int Id { get; set; }
public string Name { get; set; }
public string Team { get; set; }
public string Name { get; set; } = string.Empty;
public string Team { get; set; } = string.Empty;
public DateTime HireDate { get; set; }
public int ActiveProjects { get; set; }
public decimal Salary { get; set; }
}
}
````
````