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Change the Orientation of Header Text in ASP.NET Core Grid control

You can change the orientation of the header text by using the customAttributes property.

Ensure the following steps:

Step 1:

Create a CSS class with orientation style for the grid header cell.

.orientationcss .e-headercelldiv {
    transform: rotate(90deg);
}

Step 2:

Add the custom CSS class to a particular column by using the customAttributes property.

    <e-grid-column field="ShipCity" headerText="Ship City" width="150" customAttributes="@(new { @class="orientationcss" })"></e-grid-column>

Step 3:

Resize the header cell height by using the following code.

function setHeaderHeight(args) {
    var textWidth = document.querySelector(".orientationcss > div").scrollWidth;//Obtain the width of the headerText content.
    var headerCell = document.querySelectorAll(".e-headercell");
    for(var i = 0; i < headerCell.length; i++) {
        headerCell.item(i).style.height = textWidth + 'px'; //Assign the obtained textWidth as the height of the headerCell.
    }
}
tagHelper
orientation.cs
<ejs-grid id="Grid" dataSource="@ViewBag.DataSource" created="setHeaderHeight">
    <e-grid-columns>
        <e-grid-column field="OrderID" headerText="Order ID" textAlign="Right" width="120"></e-grid-column>
        <e-grid-column field="CustomerID" headerText="Customer ID" width="150"></e-grid-column>
        <e-grid-column field="ShipCity" headerText="Ship City" width="150" customAttributes="@(new { @class="orientationcss" })"></e-grid-column>
        <e-grid-column field="ShipName" headerText="Ship Name" width="150"></e-grid-column>
    </e-grid-columns>
</ejs-grid>

<style>

    .orientationcss .e-headercelldiv {
        transform: rotate(90deg);
    }

</style>

<script>

    function setHeaderHeight(args) {
        var textWidth = document.querySelector(".orientationcss > div").scrollWidth; // obtain the width of the headerText content.
        var headerCell = document.querySelectorAll(".e-headercell");
        for (var i = 0; i < headerCell.length; i++) {
            headerCell.item(i).style.height = textWidth + 'px'; // assign the obtained textWidth as the height of the headerCell.
        }
    }

</script>
public IActionResult Index()
{
    ViewBag.DataSource = OrderDetails.GetAllRecords();
    return View();
}