Grid / Editing / External Form
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External Form

The data of the KendoReact Grid can be edited by using an external form.

import React from 'react';
import ReactDOM from 'react-dom';
import { Grid, GridColumn as Column, GridToolbar } from '@progress/kendo-react-grid';
import { sampleProducts } from './sample-products.jsx';
import DialogContainer from './DialogContainer.jsx';
import cellWithEditing from './cellWithEditing.jsx';

class App extends React.Component {
    state = {
        products: sampleProducts.slice(0, 7),
        productInEdit: undefined
    };

    edit = (dataItem) => {
        this.setState({ productInEdit: this.cloneProduct(dataItem) });
    }

    remove = (dataItem) => {
        const products = this.state.products.slice();
        const index = products.findIndex(p => p.ProductID === dataItem.ProductID);
        if (index !== -1) {
            products.splice(index, 1);
            this.setState({
                products: products
            });
        }
    }

    save = () => {
        const dataItem = this.state.productInEdit;
        const products = this.state.products.slice();

        if (dataItem.ProductID === undefined) {
            products.unshift(this.newProduct(dataItem));
        } else {
            const index = products.findIndex(p => p.ProductID === dataItem.ProductID);
            products.splice(index, 1, dataItem);
        }

        this.setState({
            products: products,
            productInEdit: undefined
        });
    }

    cancel = () => {
        this.setState({ productInEdit: undefined });
    }

    insert = () => {
        this.setState({ productInEdit: { } });
    }

    render() {
        return (
            <div >
                <Grid
                    data={this.state.products}
                    style={{ height: '420px' }}
                >
                    <GridToolbar>
                        <button
                            onClick={this.insert}
                            className="k-button"
                        >
                            Add New
                        </button>
                    </GridToolbar>
                    <Column field="ProductID" title="Id" width="50px" />
                    <Column field="ProductName" title="Product Name" />
                    <Column field="UnitsInStock" title="Units In Stock" />
                    <Column field="Discontinued" />
                    <Column
                        title="Edit"
                        cell={cellWithEditing(this.edit, this.remove)}
                    />
                </Grid>
                {this.state.productInEdit && <DialogContainer dataItem={this.state.productInEdit} save={this.save} cancel={this.cancel}/>}
            </div>
        );
    }

    dialogTitle() {
        return `${this.state.productInEdit.ProductID === undefined ? 'Add' : 'Edit'} product`;
    }
    cloneProduct(product) {
        return Object.assign({}, product);
    }

    newProduct(source) {
        const newProduct = {
            ProductID: this.generateId(),
            ProductName: '',
            UnitsInStock: 0,
            Discontinued: false
        };

        return Object.assign(newProduct, source);
    }

    generateId() {
        let id = 1;
        this.state.products.forEach(p => { id = Math.max((p.ProductID || 0) + 1, id); });
        return id;
    }
}

ReactDOM.render(
    <App />,
    document.querySelector('my-app')
);

Setup

The following example utilizes the KendoReact Dialog as a modal form for editing the data of the Grid.

  1. When a record is in edit mode, show the container and pass the edited item to the DialogContainer component.

    {this.state.productInEdit &&
    <DialogContainer dataItem={this.state.productInEdit} save={this.save} cancel={this.cancel}/>}

  2. Inside DialogContainer, bind the editors to the value of the row data.

    <form onSubmit={this.handleSubmit}>
    <div style={{ marginBottom: '1rem' }}>
        <label>
        Product Name<br />
        <Input
            type="text"
            name="ProductName"
            value={this.state.productInEdit.ProductName || ''}
            onChange={this.onDialogInputChange}
        />
        </label>
    </div>
    <div style={{ marginBottom: '1rem' }}>
        <label>
        Units In Stock<br />
        <NumericTextBox
            name="UnitsInStock"
            value={this.state.productInEdit.UnitsInStock || 0}
            onChange={this.onDialogInputChange}
        />
        </label>
    </div>
    <div>
        <label>
        <input
            type="checkbox"
            name="Discontinued"
            checked={this.state.productInEdit.Discontinued || false}
            onChange={this.onDialogInputChange}
        />
        Discontinued product
                        </label>
    </div>
</form>

  3. Handle the change events of the editors.

    onDialogInputChange = (event) => {
    let target = event.target;
    const value = target.type === 'checkbox' ? target.checked : target.value;
    const name = target.props ? target.props.name : target.name;

    const edited = this.state.productInEdit;
    edited[name] = value;

    this.setState({
        productInEdit: edited
    });
}

  4. To improve its performance, the Grid refreshes its data on each Update button click. To update the Grid on type, directly update the data state of the Grid on change.

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