JavaScript/jQuery TreeList Methods

widgetInstance.byKey(15).done(function(dataObject) {
        // process "dataObject"
    }).fail(function(error) {
        // handle error
    });

var treeList = $("#treeListContainer").dxTreeList("instance");
treeList.cellValue(0, "Position", "CEO");
treeList.saveEditData();

import { ..., ViewChild } from "@angular/core";
import { DxTreeListModule, DxTreeListComponent } from "devextreme-angular";
// ...
export class AppComponent {
    @ViewChild(DxTreeListComponent, { static: false }) treeList: DxTreeListComponent;
    // Prior to Angular 8
    // @ViewChild(DxTreeListComponent) treeList: DxTreeListComponent;
    updateCell(rowIndex, dataField, value) {
        this.treeList.instance.cellValue(rowIndex, dataField, value);
        this.treeList.instance.saveEditData();
    }
}
@NgModule({
    imports: [
        // ...
        DxTreeListModule
    ],
    // ...
})

<template>
    <DxTreeList ...
        :ref="treeListRefKey"> 
    </DxTreeList>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import { DxTreeList } from 'devextreme-vue/tree-list';

const treeListRefKey = 'my-tree-list';

export default {
    components: {
        DxTreeList
    },
    data() {
        return {
            treeListRefKey
        };
    },
    methods: {
        updateCell(rowIndex, dataField, value) {
            this.treeList.cellValue(rowIndex, dataField, value);
            this.treeList.saveEditData();
        }
    },
    computed: {
        treeList: function() {
            return this.$refs[treeListRefKey].instance;
        }
    }
}
</script>

import React, { useRef } from 'react';
import 'devextreme/dist/css/dx.light.css';

import TreeList from 'devextreme-react/tree-list';

export default function App() {
    const treeList = useRef(null);
    const updateCell = (rowIndex, dataField, value) => {
        treeList.current.instance().cellValue(rowIndex, dataField, value);
        treeList.current.instance().saveEditData();
    };
    return (
        <TreeList ...
            ref={treeList}>
        </TreeList>
    );
}

var treeList = $("#treeListContainer").dxTreeList("instance");
treeList.cellValue(0, 1, "newValue");
treeList.saveEditData();

import { ..., ViewChild } from "@angular/core";
import { DxTreeListModule, DxTreeListComponent } from "devextreme-angular";
// ...
export class AppComponent {
    @ViewChild(DxTreeListComponent, { static: false }) treeList: DxTreeListComponent;
    // Prior to Angular 8
    // @ViewChild(DxTreeListComponent) treeList: DxTreeListComponent;
    updateCell(rowIndex, columnIndex, value) {
        this.treeList.instance.cellValue(rowIndex, columnIndex, value);
        this.treeList.instance.saveEditData();
    }
}
@NgModule({
    imports: [
        // ...
        DxTreeListModule
    ],
    // ...
})

<template>
    <DxTreeList ...
        :ref="treeListRefKey"> 
    </DxTreeList>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import { DxTreeList } from 'devextreme-vue/tree-list';

const treeListRefKey = 'my-tree-list';

export default {
    components: {
        DxTreeList
    },
    data() {
        return {
            treeListRefKey
        };
    },
    methods: {
        updateCell(rowIndex, columnIndex, value) {
            this.treeList.cellValue(rowIndex, columnIndex, value);
            this.treeList.saveEditData();
        }
    },
    computed: {
        treeList: function() {
            return this.$refs[treeListRefKey].instance;
        }
    }
}
</script>

import React, { useRef } from 'react';
import 'devextreme/dist/css/dx.light.css';

import TreeList from 'devextreme-react/tree-list';

export default function App() {
    const treeList = useRef(null);
    const updateCell = (rowIndex, columnIndex, value) => {
        treeList.current.instance().cellValue(rowIndex, columnIndex, value);
        treeList.current.instance().saveEditData();
    };
    return (
        <TreeList ...
            ref={treeList}>
        </TreeList>
    );
}

DevExpress.ui.dxTreeList.defaultOptions({ 
    device: { deviceType: "desktop" },
    options: {
        // Here go the TreeList properties
    }
});

import TreeList, { Properties } from "devextreme/ui/tree_list";
// ...
export class AppComponent {
    constructor () {
        TreeList.defaultOptions<Properties>({
            device: { deviceType: "desktop" },
            options: {
                // Here go the TreeList properties
            }
        });
    }
}

<template>
    <div>
        <DxTreeList id="treeList1" />
        <DxTreeList id="treeList2" />
    </div>
</template>
<script>
import DxTreeList from "devextreme-vue/tree-list";
import TreeList from "devextreme/ui/tree_list";

TreeList.defaultOptions({
    device: { deviceType: "desktop" },
    options: {
        // Here go the TreeList properties
    }
});

export default {
    components: {
        DxTreeList
    }
}
</script>

import dxTreeList from "devextreme/ui/tree_list";
import TreeList from "devextreme-react/tree-list";

dxTreeList.defaultOptions({
    device: { deviceType: "desktop" },
    options: {
        // Here go the TreeList properties
    }
});

export default function App() {
    return (
        <div>
            <TreeList id="treeList1" />
            <TreeList id="treeList2" />
        </div>
    )
}

const devicesConfig = [
    { deviceType: 'desktop' },
    { deviceType: 'tablet' },
    { deviceType: 'phone' },
];

devicesConfig.forEach(deviceConfig => {
    DevExpress.ui.dxTreeList.defaultOptions({ 
        device: deviceConfig,
        options: {
            // Here go the TreeList properties
        }
    });
});

import TreeList, { Properties } from "devextreme/ui/tree_list";
// ...
export class AppComponent {
    constructor () {
        const devicesConfig = [
            { deviceType: 'desktop' },
            { deviceType: 'tablet' },
            { deviceType: 'phone' },
        ];

        devicesConfig.forEach(deviceConfig => {
            TreeList.defaultOptions<Properties>({
                device: deviceConfig,
                options: {
                    // Here go the TreeList properties
                }
            });
        });
    }
}

<template>
    <div>
        <DxTreeList />
    </div>
</template>
<script>
import DxTreeList from "devextreme-vue/tree-list";
import TreeList from "devextreme/ui/tree_list";

const devicesConfig = [
    { deviceType: 'desktop' },
    { deviceType: 'tablet' },
    { deviceType: 'phone' },
];

devicesConfig.forEach(deviceConfig => {
    TreeList.defaultOptions({
        device: deviceConfig,
        options: {
            // Here go the TreeList properties
        }
    });
});

export default {
    components: {
        DxTreeList
    }
}
</script>

import dxTreeList from "devextreme/ui/tree_list";
import TreeList from "devextreme-react/tree-list";

const devicesConfig = [
    { deviceType: 'desktop' },
    { deviceType: 'tablet' },
    { deviceType: 'phone' },
];

devicesConfig.forEach(deviceConfig => {
    dxTreeList.defaultOptions({
        device: deviceConfig,
        options: {
            // Here go the TreeList properties
        }
    });
});

export default function App() {
    return (
        <div>
            <TreeList />
        </div>
    )
}

$("#myTreeList").dxTreeList("dispose");
$("#myTreeList").remove();

<dx-tree-list ...
    *ngIf="condition">
</dx-tree-list>

<template>
    <DxTreeList ...
        v-if="condition">
    </DxTreeList>
</template>

<script>
import DxTreeList from 'devextreme-vue/tree-list';

export default {
    components: {
        DxTreeList
    }
}
</script>

import React from 'react';

import TreeList from 'devextreme-react/tree-list';

function DxTreeList(props) {
    if (!props.shouldRender) {
        return null;
    }

    return (
        <TreeList ... >    
        </TreeList>
    );
}

class App extends React.Component {
    render() {
        return (
            <DxTreeList shouldRender="condition" />
        );
    }
}
export default App;

var treeList = $("#treeListContainer").dxTreeList("instance");

var selectedRowsData = treeList.getSelectedRowsData();

<template>
    <DxTreeList ...
        :ref="treeListRef">
    </DxTreeList>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import DxTreeList from 'devextreme-vue/tree-list';

const treeListRef = 'treeList';

export default {
    components: {
        DxTreeList
    },
    data() {
        return {
            treeListRef,
            selectedRowsData: []
        }
    },
    computed: {
        treeList: function() {
            return this.$refs[treeListRef].instance;
        }
    },
    methods: {
        getSelectedData() {
            this.selectedRowsData = this.treeList.getSelectedRowsData();
        }
    }
}
</script>

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import TreeList from 'devextreme-react/tree-list';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.treeListRef = React.createRef();

        this.selectedRowsData = [];

        this.getSelectedData = () => {
            this.selectedRowsData = this.treeList.getSelectedRowsData();
        }
    }

    get treeList() {
        return this.treeListRef.current.instance();
    }

    render() {
        return (
            <TreeList ...
                ref={this.treeListRef}>
            </TreeList>
        );
    }
}
export default App;

@(Html.DevExtreme().TreeList()
    .ID("treeList")
    @* ... *@
)

<script type="text/javascript">
    function getSelectedData() {
        var treeList = $("#treeList").dxTreeList("instance");
        var selectedRowsData = treeList.getSelectedRowsData();
        // ...
    }
</script>

var treeList = $("#treeListContainer").dxTreeList("instance");

var selectedRowsData = treeList.getSelectedRowsData("leavesOnly");

<template>
    <DxTreeList ...
        :ref="treeListRef">
    </DxTreeList>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import DxTreeList from 'devextreme-vue/tree-list';

const treeListRef = 'treeList';

export default {
    components: {
        DxTreeList
    },
    data() {
        return {
            treeListRef,
            selectedRowsData: []
        }
    },
    computed: {
        treeList: function() {
            return this.$refs[treeListRef].instance;
        }
    },
    methods: {
        getSelectedData() {
            this.selectedRowsData = this.treeList.getSelectedRowsData('leavesOnly');
        }
    }
}
</script>

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import TreeList from 'devextreme-react/tree-list';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.treeListRef = React.createRef();

        this.selectedRowsData = [];

        this.getSelectedData = () => {
            this.selectedRowsData = this.treeList.getSelectedRowsData('leavesOnly');
        }
    }

    get treeList() {
        return this.treeListRef.current.instance();
    }

    render() {
        return (
            <TreeList ...
                ref={this.treeListRef}>
            </TreeList>
        );
    }
}
export default App;

@(Html.DevExtreme().TreeList()
    .ID("treeList")
    @* ... *@
)

<script type="text/javascript">
    function getSelectedData() {
        var treeList = $("#treeList").dxTreeList("instance");
        var selectedRowsData = treeList.getSelectedRowsData();
        // ...
    }
</script>

var treeList = $("#treeListContainer").dxTreeList("instance");
treeList.refresh()
    .done(function() {
        // ...
    })
    .fail(function(error) {
        // ...
    });

<dx-tree-list #treeListVar ... >
    <!-- ... -->
</dx-tree-list>

import { Component, ViewChild } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    @ViewChild('treeListVar', { static: false }) treeList: DxTreeListComponent;
    // Prior to Angular 8
    // @ViewChild('treeListVar') treeList: DxTreeListComponent;

    refreshTreeList() {
        this.treeList.instance.refresh()
            .then(function() {
                // ...
            })
            .catch(function(error) {
                // ...
            });
    }
}

<template>
    <DxTreeList ...
        :ref="treeListRefKey">
        <!-- ... -->
    </DxTreeList>
</template>
<script>
import 'devextreme/dist/css/dx.light.css';

import { DxTreeList, /* ... */ } from 'devextreme-vue/tree-list';

const treeListRefKey = 'my-tree-list';

export default {
    components: {
        DxTreeList,
        // ...
    },
    data() {
        return {
            treeListRefKey
        };
    },
    computed: {
        treeList: function() {
            return this.$refs[treeListRefKey].instance;
        }
    },
    methods: {
        refreshTreeList() {
            this.treeList.refresh()
                .then(function() {
                    // ...
                })
                .catch(function(error) {
                    // ...
                });
        }
    }
};
</script>

import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import { TreeList, /* ... */ } from 'devextreme-react/tree-list';

class App extends React.Component {
    render() {
        return (
            <TreeList ...
                ref={ref => this.treeList = ref}>
                {/* ... */}
            </TreeList>
        );
    }
    refreshTreeList() {
        this.treeList.instance.refresh()
            .then(function() {
                // ...
            })
            .catch(function(error) {
                // ...
            });
    }
}
export default App;

@(Html.DevExtreme().TreeList()
    .ID("treeListContainer")
    // ...
)
<script type="text/javascript">
    function refreshTreeList() {
        var treeList = $("#treeListContainer").dxTreeList("instance");
        treeList.refresh()
            .done(function() {
                // ...
            })
            .fail(function(error) {
                // ...
            });
    }
</script>

$(function () {
    const treeList = $("#treeListContainer").dxTreeList({ 
        // ...
    }).dxTreeList("instance");
    $("#save").dxButton({
        text: "Save State",
        onClick: function() {
            const state = treeList.state();
            // Saves the state in the local storage
            localStorage.setItem("treeListState", JSON.stringify(state));
        }
    });
    $("#load").dxButton({
        text: "Load State",
        onClick: function() {
            const state = JSON.parse(localStorage.getItem("treeListState"));
            treeList.state(state);
        }
    });
});

<template>
    <DxTreeList ...
        :ref="treeListRefKey">
    </DxTreeList>
    <DxButton
        text="Save State"
        @click="saveState"
    />
    <DxButton
        text="Load State"
        @click="loadState"
    />
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import DxTreeList, {
    // ...
} from 'devextreme-vue/tree-list';
import DxButton from 'devextreme-vue/button';

const treeListRefKey = "my-tree-list";

export default {
    components: {
        DxTreeList,
        // ...
        DxButton
    },
    data() {
        return {
            treeListRefKey
        }
    },
    methods: {
        saveState() {
            const state = this.treeList.state();
            // Saves the state in the local storage
            localStorage.setItem("treeListState", JSON.stringify(state));
        },
        loadState() {
            const state = JSON.parse(localStorage.getItem("treeListState"));
            this.treeList.state(state);
        }
    },
    computed: {
        treeList: function() {
            return this.$refs[treeListRefKey].instance;
        }
    }
}
</script>

import React, { useRef } from 'react';
import 'devextreme/dist/css/dx.light.css';

import TreeList, {
    // ...
} from 'devextreme-react/tree-list';
import Button from 'devextreme-react/button';

export default function App() {
    const treeList = useRef(null);
    const saveState = () => {
        const state = treeList.current.instance().state();
        // Saves the state in the local storage
        localStorage.setItem("treeListState", JSON.stringify(state));
    };
    const loadState = () => {
        const state = JSON.parse(localStorage.getItem("treeListState"));
        treeList.current.instance().state(state);
    };
    return (
        <React.Fragment>
            <TreeList ...
                ref={treeList}>
            </TreeList>
            <Button
                text="Save State"
                onClick={saveState}
            />
            <Button
                text="Load State"
                onClick={loadState}
            />
        </React.Fragment>
    );
}