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Change Column Header Text Dynamically

You can change the column headerText dynamically through an external button.

Follow the given steps to change the header text dynamically:

Step 1:

Get the column object corresponding to the field name by using the getColumnByField method. Then change the header Text value.

let column = this.grid.getColumnByField('ShipCity'); // Get column object.
column.headerText = 'Changed Text';

Step 2:

To reflect the changes in the grid header, invoke the refreshHeader method.

this.grid.refreshHeader();
Source
Preview
app.component.ts
app.module.ts
main.ts
import { Component, OnInit, ViewChild } from '@angular/core';
import { GridComponent } from '@syncfusion/ej2-angular-grids';
import { data } from './datasource';


@Component({
    selector: 'app-root',
    template: `<button ej-button class='e-flat' (click)='click()'>Change Header Text</button>
                <ejs-grid #grid [dataSource]='data' [height]='280' >
                    <e-columns>
                        <e-column field='OrderID' headerText='Order ID' textAlign='Right' width=90></e-column>
                        <e-column field='CustomerID' headerText='Customer ID' width=120></e-column>
                        <e-column field='Freight' headerText='Freight' textAlign='Right' format='C2' width=90></e-column>
                        <e-column field='ShipCity' headerText='Ship City' width=120 ></e-column>
                    </e-columns>
                </ejs-grid>`
})
export class AppComponent implements OnInit {

    public data: object[];
    @ViewChild('grid') public grid: GridComponent;

    ngOnInit(): void {
        this.data = data;
    }
    click(): void {
        const column = this.grid.getColumnByField('ShipCity'); // get the JSON object of the column corresponding to the field name
        column.headerText = 'Changed Text'; // assign a new header text to the column
        this.grid.refreshHeader();
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { GridModule } from '@syncfusion/ej2-angular-grids';
import { AppComponent } from './app.component';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        GridModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);