应用十一：Vue之基于ElementUI封装execl导入组件

                <
                template
                >
                <
                div 
                id
                ="myImport"
                >
                <
                el-button 
                type
                ="primary"
                 plain @click
                ="importDialogVisible = true"
                >导入</el-button><!-- 导入弹窗 --><el-dialog :title="name + ‘导入‘" :visible.sync="importDialogVisible" width="560px"
          :close-on-click-modal="false" @close="fileList = []"><div v-loading="loading" element-loading-text="正在导入"><div style="color: #2D2D2D;margin-bottom: 20px;">导入文件</div><el-upload class="upload-demo"
            ref="upload"
            :action="url"
            name="file"
            :headers="importHeaders"
            :on-change="changeUpload"
            :on-success="uploadSuccess"
            :file-list="fileList"
            :limit="1"
            :multiple="false"
            :auto-upload="false"><el-button slot="trigger" type="primary">选取文件</el-button><div slot="tip" class="el-upload__tip"></div></el-upload><br><div v-if="templateUrl"><span class="download-template" @click="templateDownload">{{name + ‘模板下载‘}}</span></div><el-button class="import-btn" type="primary" @click="submitUpload">导入</el-button></div></el-dialog></div></template><script lang="ts">
import { Component, Prop, Emit, Vue, Ref } from ‘vue-property-decorator‘

@Component
export default class MyImport extends Vue {
  @Prop({ default: ‘‘ }) private url!: string  // 导入接口地址  @Prop({ default: ‘‘ }) private templateUrl!: string  // 模板下接口地址  @Prop({ default: ‘‘ }) private name!: string

  private loading: boolean=false
  private importDialogVisible: boolean=false
  private importHeaders:any = {‘token‘: sessionStorage.getItem(‘token‘)}
  private fileList: Array<any>= []

  //  下载导入模板  public templateDownload() {
    // TODO   }

  @Ref() readonly upload!: any

  public changeUpload(file: File, fileList: Array<any>) {
    let index: number = file.name.lastIndexOf(‘.‘)
    let suffix: string = file.name.substring(index +1).toUpperCase()
    if (suffix !==‘XLS‘&& suffix !==‘XLSX‘) {
      this.$message.error(‘只支持导入execl文件‘)
      this.upload.clearFiles()
      returnfalse
    }
    this.fileList = fileList
  }

  public submitUpload() {
    if(this.fileList.length ==0) {
      this.$message.error(‘请选择要导入的文件‘)
      returnfalse
    }
    this.loading =truethis.upload.submit()
  }

  @Emit(‘uploadSuccess‘)
  public uploadSuccess(res: any) {
    this.loading =falsethis.importDialogVisible =false;
    return res
  }
}
</script><style lang="scss">
  #myImport {
    display: inline-block;
    margin-left: 10px;
    .download-template {
      color: #5C5C5C;
      font-size: 12px;
      border-bottom: 1px solid #5C5C5C;
      cursor: pointer;}
    .import-btn {
      position: relative;
      right: -420px;}
  }
</style>