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+---
+title: Adjust Grid Column Header Styles Dynamically
+description: Learn how to dynamically change the style of a column header cell in a Telerik Blazor Grid based on condition.
+type: how-to
+page_title: How to Style Column Header Cells Dynamically in a Telerik Blazor Grid
+slug: grid-dynamically-adjusting-column-header-styles
+tags: grid, blazor, headerclass
+res_type: kb
+ticketid: 1670074
+---
+
+## Environment
+
+
+
+
+ | Product |
+ Grid for Blazor, TreeList for Blazor |
+
+
+
+
+## Description
+
+I am dynamically creating Grid columns in a loop and trying to adjust the column header cell style based on some condition and value from the [column field]({%slug components/grid/columns/bound%}#data-binding). Ideally, I want to implement logic to make this adjustment based on the value in the header cell. I have not been able to achieve this in the `HeaderTemplate` tag or in any of the cell render events handlers. In other templates, I have access to the `@context` field, which would make this easy, but that doesn't seem to work in the `HeaderTemplate`.
+
+## Solution
+
+To style a column header cell when dynamically creating columns in a loop, use the [`HeaderClass` parameter]({%slug components/grid/columns/bound%}#appearance) to set a CSS class under a condition and apply different styles depending on the class. For scenarios with numerous and more complex conditions, you can create a method to determine the appropriate class.
+
+Note that the [`HeaderTemplate`]({%slug grid-templates-column-header%}) does not receive a context argument because it is not related to rows and models, as outlined in the [Templates Overview]({%slug components/grid/features/templates%}) of the Telerik UI for Blazor documentation.
+
+### Example
+
+````CSHTML
+
+
+
+ @for (int i = 0; i <= MaxYears; i++)
+ {
+
+ }
+
+
+
+
+
+
+@code {
+ private List GridData { get; set; } = new();
+ private const int MaxYears = 10;
+ private const int StartYear = 2020;
+ private int currYear { get; set; } = DateTime.Now.Year;
+
+ private string GetHeaderClass(int year)
+ {
+ if (year <= StartYear)
+ return "past-year-column";
+ else if (year < currYear)
+ return "previous-year-column";
+ else if (year == currYear)
+ return "current-year-column";
+ else
+ return "future-year-column";
+ }
+
+ protected override void OnInitialized()
+ {
+ GridData = new List();
+
+ for (int i = 1; i <= 20; i++)
+ {
+ GridData.Add(new Product
+ {
+ Id = i,
+ Name = "Product name " + i,
+ StartYear0 = Random.Shared.Next(100, 9999),
+ StartYear1 = Random.Shared.Next(100, 9999),
+ StartYear2 = Random.Shared.Next(100, 9999),
+ StartYear3 = Random.Shared.Next(100, 9999),
+ StartYear4 = Random.Shared.Next(100, 9999),
+ StartYear5 = Random.Shared.Next(100, 9999),
+ StartYear6 = Random.Shared.Next(100, 9999),
+ StartYear7 = Random.Shared.Next(100, 9999),
+ StartYear8 = Random.Shared.Next(100, 9999),
+ StartYear9 = Random.Shared.Next(100, 9999),
+ StartYear10 = Random.Shared.Next(100, 9999)
+ });
+
+ }
+
+ base.OnInitialized();
+ }
+
+ public class Product
+ {
+ public int Id { get; set; }
+ public string Name { get; set; }
+ public double? StartYear0 { get; set; }
+ public double? StartYear1 { get; set; }
+ public double? StartYear2 { get; set; }
+ public double? StartYear3 { get; set; }
+ public double? StartYear4 { get; set; }
+ public double? StartYear5 { get; set; }
+ public double? StartYear6 { get; set; }
+ public double? StartYear7 { get; set; }
+ public double? StartYear8 { get; set; }
+ public double? StartYear9 { get; set; }
+ public double? StartYear10 { get; set; }
+ }
+}
+```
+
+## See Also
+
+- [Grid HeaderClass Parameter]({%slug components/grid/columns/bound%}#appearance)
+- [Grid Column Header Template]({%slug grid-templates-column-header%})
+- [Templates Overview - Telerik UI for Blazor]({%slug components/grid/features/templates%})