!24008 dataShare相关使用说明文档示例代码ArkTs规范整改

Merge pull request !24008 from 刘赛美/master

zh-cn/application-dev/database/share-data-by-datashareextensionability.md

@@ -60,36 +60,34 @@
 3. 在DataShareExtAbility.ts文件中，导入
 `@ohos.application.DataShareExtensionAbility`模块，开发者可根据应用需求选择性重写其业务实现。例如数据提供方只提供插入、删除和查询服务，则可只重写这些接口，并导入对应的基础依赖模块。
    
-   ```js
+   ```ts
    import Extension from '@ohos.application.DataShareExtensionAbility';
-   import rdb from '@ohos.data.relationalStore';
    import dataSharePredicates from '@ohos.data.dataSharePredicates';
    import relationalStore from '@ohos.data.relationalStore';
    import Want from '@ohos.app.ability.Want';
+   import { BusinessError } from '@ohos.base'
    ```
 
 4. 数据提供方的业务实现由开发者自定义。例如可以通过数据库、读写文件或访问网络等各方式实现数据提供方的数据存储。
    
-   ```js
+   ```ts
    const DB_NAME = 'DB00.db';
    const TBL_NAME = 'TBL00';
    const DDL_TBL_CREATE = "CREATE TABLE IF NOT EXISTS "
-   + TBL_NAME
-   + ' (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER, isStudent BOOLEAN, Binary BINARY)';
-   
+     + TBL_NAME
+     + ' (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER, isStudent BOOLEAN, Binary BINARY)';
+
    let rdbStore: relationalStore.RdbStore;
    let result: string;
-   
+
    export default class DataShareExtAbility extends Extension {
-     private rdbStore_: relationalStore.RdbStore;
-   
      // 重写onCreate接口
      onCreate(want: Want, callback: Function) {
        result = this.context.cacheDir + '/datashare.txt';
        // 业务实现使用RDB
-       rdb.getRdbStore(this.context, {
+       relationalStore.getRdbStore(this.context, {
          name: DB_NAME,
-         securityLevel: rdb.SecurityLevel.S1
+         securityLevel: relationalStore.SecurityLevel.S1
        }, (err, data) => {
          rdbStore = data;
          rdbStore.executeSql(DDL_TBL_CREATE, [], (err) => {
@@ -100,7 +98,7 @@
          }
        });
      }
-   
+
      // 重写query接口
      query(uri: string, predicates: dataSharePredicates.DataSharePredicates, columns: Array<string>, callback: Function) {
        if (predicates === null || predicates === undefined) {
@@ -116,7 +114,9 @@
            }
          });
        } catch (err) {
-         console.error(`Failed to query. Code:${err.code},message:${err.message}`);
+         let code = (err as BusinessError).code;
+         let message = (err as BusinessError).message
+         console.error(`Failed to query. Code:${code},message:${message}`);
        }
      }
      // 可根据应用需求，选择性重写各个接口
@@ -186,7 +186,7 @@
 
 1. 导入基础依赖包。
    
-   ```js
+   ```ts
    import UIAbility from '@ohos.app.ability.UIAbility';
    import dataShare from '@ohos.data.dataShare';
    import dataSharePredicates from '@ohos.data.dataSharePredicates';
@@ -196,17 +196,17 @@
 
 2. 定义与数据提供方通信的URI字符串。
    
-   ```js
+   ```ts
    // 作为参数传递的URI，与module.json5中定义的URI的区别是多了一个"/"，是因为作为参数传递的URI中，在第二个与第三个"/"中间，存在一个DeviceID的参数
    let dseUri = ('datashareproxy://com.samples.datasharetest.DataShare');
    ```
 
 3. 创建工具接口类对象。
    
-   ```js
-   let dsHelper: dataShare.DataShareHelper;
+   ```ts
+   let dsHelper: dataShare.DataShareHelper | undefined = undefined;
    let abilityContext: Context;
-   
+
    export default class EntryAbility extends UIAbility {
      onWindowStageCreate(windowStage: window.WindowStage) {
        abilityContext = this.context;
@@ -219,7 +219,7 @@
 
 4. 获取到接口类对象后，便可利用其提供的接口访问提供方提供的服务，如进行数据的增删改查等。
    
-   ```js
+   ```ts
    // 构建一条数据
    let key1 = 'name';
    let key2 = 'age';
@@ -236,22 +236,24 @@
    let updateBucket: ValuesBucket = { key1: valueName2, key2: valueAge2, key3: valueIsStudent2, key4: valueBinary };
    let predicates = new dataSharePredicates.DataSharePredicates();
    let valArray = ['*'];
-   // 插入一条数据
-   dsHelper.insert(dseUri, valuesBucket, (err, data) => {
-     console.info(`dsHelper insert result:${data}`);
-   });
-   // 更新数据
-   dsHelper.update(dseUri, predicates, updateBucket, (err, data) => {
-     console.info(`dsHelper update result:${data}`);
-   });
-   // 查询数据
-   dsHelper.query(dseUri, predicates, valArray, (err, data) => {
-     console.info(`dsHelper query result:${data}`);
-   });
-   // 删除指定的数据
-   dsHelper.delete(dseUri, predicates, (err, data) => {
-     console.info(`dsHelper delete result:${data}`);
-   });
+   if (dsHelper != undefined) {
+     // 插入一条数据
+     (dsHelper as dataShare.DataShareHelper).insert(dseUri, valuesBucket, (err, data) => {
+       console.info(`dsHelper insert result:${data}`);
+     });
+     // 更新数据
+     (dsHelper as dataShare.DataShareHelper).update(dseUri, predicates, updateBucket, (err, data) => {
+       console.info(`dsHelper update result:${data}`);
+     });
+     // 查询数据
+     (dsHelper as dataShare.DataShareHelper).query(dseUri, predicates, valArray, (err, data) => {
+       console.info(`dsHelper query result:${data}`);
+     });
+     // 删除指定的数据
+     (dsHelper as dataShare.DataShareHelper).delete(dseUri, predicates, (err, data) => {
+       console.info(`dsHelper delete result:${data}`);
+     });
+   }
    ```
 
 ## 相关实例

zh-cn/application-dev/reference/apis/js-apis-application-dataShareExtensionAbility.md

@@ -43,31 +43,32 @@ DataShare客户端连接DataShareExtensionAbility服务端时，服务端回调
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.relationalStore';
+import relationalStore from '@ohos.data.relationalStore'
+import Want from '@ohos.app.ability.Want'
 
 let DB_NAME = 'DB00.db';
 let TBL_NAME = 'TBL00';
 let DDL_TBL_CREATE = 'CREATE TABLE IF NOT EXISTS '
-    + TBL_NAME
-    + ' (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER, phoneNumber DOUBLE, isStudent BOOLEAN, Binary BINARY)';
+  + TBL_NAME
+  + ' (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER, phoneNumber DOUBLE, isStudent BOOLEAN, Binary BINARY)';
 let rdbStore: relationalStore.RdbStore;
 
 export default class DataShareExtAbility extends DataShareExtensionAbility {
-    onCreate(want: Want, callback: Function) {
-        rdb.getRdbStore(this.context, {
-            name: DB_NAME,
-            securityLevel: rdb.SecurityLevel.S1
-        }, (err, data) => {
-            console.info(`getRdbStore done, data : ${data}`);
-            rdbStore = data;
-            rdbStore.executeSql(DDL_TBL_CREATE, [], (err) => {
-                console.error(`executeSql done, error message : ${err}`);
-            });
-            if (callback) {
-                callback();
-            }
-        });
-    }
+  onCreate(want: Want, callback: Function) {
+    relationalStore.getRdbStore(this.context, {
+      name: DB_NAME,
+      securityLevel: relationalStore.SecurityLevel.S1
+    }, (err, data) => {
+      console.info(`getRdbStore done, data : ${data}`);
+      rdbStore = data;
+      rdbStore.executeSql(DDL_TBL_CREATE, [], (err) => {
+        console.error(`executeSql done, error message : ${err}`);
+      });
+      if (callback) {
+        callback();
+      }
+    });
+  }
 };
 ```
 
@@ -90,29 +91,25 @@ insert?(uri: string, valueBucket: ValuesBucket, callback: AsyncCallback<numbe
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.relationalStore';
+import relationalStore from '@ohos.data.relationalStore'
 import { ValuesBucket } from '@ohos.data.ValuesBucket'
 
-let DB_NAME = 'DB00.db';
 let TBL_NAME = 'TBL00';
-let DDL_TBL_CREATE = 'CREATE TABLE IF NOT EXISTS '
-    + TBL_NAME
-    + ' (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER, phoneNumber DOUBLE, isStudent BOOLEAN, Binary BINARY)';
 let rdbStore: relationalStore.RdbStore;
 
 export default class DataShareExtAbility extends DataShareExtensionAbility {
-    insert(uri: string, valueBucket: ValuesBucket, callback: Function) {
-        if (valueBucket === null) {
-            console.error('invalid valueBuckets');
-            return;
-        }
-        rdbStore.insert(TBL_NAME, valueBucket, (err, ret) => {
-            console.info(`callback ret: ${ret}`);
-            if (callback !== undefined) {
-                callback(err, ret);
-            }
-        });
+  insert(uri: string, valueBucket: ValuesBucket, callback: Function) {
+    if (valueBucket === null) {
+      console.error('invalid valueBuckets');
+      return;
     }
+    rdbStore.insert(TBL_NAME, valueBucket, (err, ret) => {
+      console.info(`callback ret: ${ret}`);
+      if (callback !== undefined) {
+        callback(err, ret);
+      }
+    });
+  }
 };
 ```
 
@@ -136,28 +133,24 @@ update?(uri: string, predicates: dataSharePredicates.DataSharePredicates, valueB
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.relationalStore';
+import relationalStore from '@ohos.data.relationalStore';
 import dataSharePredicates from '@ohos.data.dataSharePredicates';
 import { ValuesBucket } from '@ohos.data.ValuesBucket'
 
-let DB_NAME = 'DB00.db';
 let TBL_NAME = 'TBL00';
-let DDL_TBL_CREATE = 'CREATE TABLE IF NOT EXISTS '
-    + TBL_NAME
-    + ' (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER, phoneNumber DOUBLE, isStudent BOOLEAN, Binary BINARY)';
 let rdbStore: relationalStore.RdbStore;
 
 export default class DataShareExtAbility extends DataShareExtensionAbility {
-    update(uri: string, predicates: dataSharePredicates.DataSharePredicates, valueBucket: ValuesBucket, callback: Function) {
-        if (predicates === null || predicates === undefined) {
-            return;
-        }
-        rdbStore.update(TBL_NAME, valueBucket, predicates, (err, ret) => {
-            if (callback !== undefined) {
-                callback(err, ret);
-            }
-        });
+  update(uri: string, predicates: dataSharePredicates.DataSharePredicates, valueBucket: ValuesBucket, callback: Function) {
+    if (predicates === null || predicates === undefined) {
+      return;
     }
+    rdbStore.update(TBL_NAME, valueBucket, predicates, (err, ret) => {
+      if (callback !== undefined) {
+        callback(err, ret);
+      }
+    });
+  }
 };
 ```
 
@@ -180,27 +173,23 @@ delete?(uri: string, predicates: dataSharePredicates.DataSharePredicates, callba
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.relationalStore';
+import relationalStore from '@ohos.data.relationalStore';
 import dataSharePredicates from '@ohos.data.dataSharePredicates';
 
-let DB_NAME = 'DB00.db';
 let TBL_NAME = 'TBL00';
-let DDL_TBL_CREATE = 'CREATE TABLE IF NOT EXISTS '
-    + TBL_NAME
-    + ' (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER, phoneNumber DOUBLE, isStudent BOOLEAN, Binary BINARY)';
 let rdbStore: relationalStore.RdbStore;
 
 export default class DataShareExtAbility extends DataShareExtensionAbility {
-    delete(uri: string, predicates: dataSharePredicates.DataSharePredicates, callback: Function) {
-        if (predicates === null || predicates === undefined) {
-            return;
-        }
-        rdbStore.delete(TBL_NAME, predicates, (err, ret) => {
-            if (callback !== undefined) {
-                callback(err, ret);
-            }
-        });
+  delete(uri: string, predicates: dataSharePredicates.DataSharePredicates, callback: Function) {
+    if (predicates === null || predicates === undefined) {
+      return;
     }
+    rdbStore.delete(TBL_NAME, predicates, (err, ret) => {
+      if (callback !== undefined) {
+        callback(err, ret);
+      }
+    });
+  }
 };
 ```
 
@@ -224,30 +213,26 @@ query?(uri: string, predicates: dataSharePredicates.DataSharePredicates, columns
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.relationalStore';
+import relationalStore from '@ohos.data.relationalStore';
 import dataSharePredicates from '@ohos.data.dataSharePredicates';
 
-let DB_NAME = 'DB00.db';
 let TBL_NAME = 'TBL00';
-let DDL_TBL_CREATE = 'CREATE TABLE IF NOT EXISTS '
-    + TBL_NAME
-    + ' (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER, phoneNumber DOUBLE, isStudent BOOLEAN, Binary BINARY)';
 let rdbStore: relationalStore.RdbStore;
 
 export default class DataShareExtAbility extends DataShareExtensionAbility {
-    query(uri: string, predicates: dataSharePredicates.DataSharePredicates, columns: Array<string>, callback: Function) {
-        if (predicates === null || predicates === undefined) {
-            return;
-        }
-        rdbStore.query(TBL_NAME, predicates, columns, (err, resultSet) => {
-            if (resultSet !== undefined) {
-                console.info(`resultSet.rowCount: ${resultSet.rowCount}`);
-            }
-            if (callback !== undefined) {
-                callback(err, resultSet);
-            }
-        });
+  query(uri: string, predicates: dataSharePredicates.DataSharePredicates, columns: Array<string>, callback: Function) {
+    if (predicates === null || predicates === undefined) {
+      return;
     }
+    rdbStore.query(TBL_NAME, predicates, columns, (err, resultSet) => {
+      if (resultSet !== undefined) {
+        console.info(`resultSet.rowCount: ${resultSet.rowCount}`);
+      }
+      if (callback !== undefined) {
+        callback(err, resultSet);
+      }
+    });
+  }
 };
 ```
 
@@ -270,14 +255,10 @@ batchInsert?(uri: string, valueBuckets: Array&lt;ValuesBucket&gt;, callback: Asy
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.relationalStore';
+import relationalStore from '@ohos.data.relationalStore';
 import { ValuesBucket } from '@ohos.data.ValuesBucket'
 
-let DB_NAME = 'DB00.db';
 let TBL_NAME = 'TBL00';
-let DDL_TBL_CREATE = 'CREATE TABLE IF NOT EXISTS '
-    + TBL_NAME
-    + ' (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER, phoneNumber DOUBLE, isStudent BOOLEAN, Binary BINARY)';
 let rdbStore: relationalStore.RdbStore;
 
 export default class DataShareExtAbility extends DataShareExtensionAbility {
@@ -313,6 +294,8 @@ normalizeUri?(uri: string, callback: AsyncCallback&lt;string&gt;): void
 **示例：**
 
 ```ts
+import { BusinessError } from '@ohos.base'
+
 export default class DataShareExtAbility extends DataShareExtensionAbility {
   normalizeUri(uri: string, callback: Function) {
     let key = 'code';
@@ -346,6 +329,8 @@ denormalizeUri?(uri: string, callback: AsyncCallback&lt;string&gt;): void
 **示例：**
 
 ```ts
+import { BusinessError } from '@ohos.base'
+
 export default class DataShareExtAbility extends DataShareExtensionAbility {
   denormalizeUri(uri: string, callback: Function) {
     let key = 'code';

zh-cn/application-dev/reference/apis/js-apis-data-DataShareResultSet.md

@@ -24,27 +24,29 @@ import dataShare from '@ohos.data.dataShare';
 import dataSharePredicates from '@ohos.data.dataSharePredicates'
 import { BusinessError } from '@ohos.base'
 
-let dataShareHelper: dataShare.DataShareHelper;
+let dataShareHelper: dataShare.DataShareHelper | undefined = undefined;
 let uri = ("datashare:///com.samples.datasharetest.DataShare");
 await dataShare.createDataShareHelper(this.context, uri, (err, data) => {
-	if (err != undefined) {
-        console.error("createDataShareHelper fail, error message : " + err);
-    } else {
-        console.info("createDataShareHelper end, data : " + data);
-        dataShareHelper = data;
-    }
+  if (err != undefined) {
+    console.error("createDataShareHelper fail, error message : " + err);
+  } else {
+    console.info("createDataShareHelper end, data : " + data);
+    dataShareHelper = data;
+  }
 });
 
 let columns = ["*"];
 let da = new dataSharePredicates.DataSharePredicates();
-let resultSet: DataShareResultSet;
+let resultSet: DataShareResultSet | undefined = undefined;
 da.equalTo("name", "ZhangSan");
-dataShareHelper.query(uri, da, columns).then((data: DataShareResultSet) => {
+if (dataShareHelper != undefined) {
+  (dataShareHelper as dataShare.DataShareHelper).query(uri, da, columns).then((data: DataShareResultSet) => {
     console.info("query end, data : " + data);
     resultSet = data;
-}).catch((err: BusinessError) => {
-	console.error("query fail, error message : " + err);
-});
+  }).catch((err: BusinessError) => {
+    console.error("query fail, error message : " + err);
+  });
+}
 ```
 
 ## DataShareResultSet
@@ -78,8 +80,10 @@ goToFirstRow(): boolean
 **示例：**
 
 ```ts
-let isGoTOFirstRow = resultSet.goToFirstRow();
-console.info('resultSet.goToFirstRow: ' + isGoTOFirstRow);
+if (resultSet != undefined) {
+  let isGoToFirstRow = (resultSet as DataShareResultSet).goToFirstRow();
+  console.info('resultSet.goToFirstRow: ' + isGoToFirstRow);
+}
 ```
 
 ### goToLastRow
@@ -99,8 +103,10 @@ goToLastRow(): boolean
 **示例：**
 
 ```ts
-let isGoToLastRow = resultSet.goToLastRow();
-console.info('resultSet.goToLastRow: ' + isGoToLastRow);
+if (resultSet != undefined) {
+  let isGoToLastRow = (resultSet as DataShareResultSet).goToLastRow();
+  console.info('resultSet.goToLastRow: ' + isGoToLastRow);
+}
 ```
 
 ### goToNextRow
@@ -120,8 +126,10 @@ goToNextRow(): boolean
 **示例：**
 
 ```ts
-let isGoToNextRow = resultSet.goToNextRow();
-console.info('resultSet.goToNextRow: ' + isGoToNextRow);
+if (resultSet != undefined) {
+  let isGoToNextRow = (resultSet as DataShareResultSet).goToNextRow();
+  console.info('resultSet.goToNextRow: ' + isGoToNextRow);
+}
 ```
 
 ### goToPreviousRow
@@ -141,8 +149,10 @@ goToPreviousRow(): boolean
 **示例：**
 
 ```ts
-let isGoToPreviousRow = resultSet.goToPreviousRow();
-console.info('resultSet.goToPreviousRow: ' + isGoToPreviousRow);
+if (resultSet != undefined) {
+  let isGoToPreviousRow = (resultSet as DataShareResultSet).goToPreviousRow();
+  console.info('resultSet.goToPreviousRow: ' + isGoToPreviousRow);
+}
 ```
 
 ### goTo
@@ -169,8 +179,10 @@ goTo(offset:number): boolean
 
 ```ts
 let goToNum = 1;
-let isGoTo = resultSet.goTo(goToNum);
-console.info('resultSet.goTo: ' + isGoTo);
+if (resultSet != undefined) {
+  let isGoTo = (resultSet as DataShareResultSet).goTo(goToNum);
+  console.info('resultSet.goTo: ' + isGoTo);
+}
 ```
 
 ### goToRow
@@ -197,8 +209,10 @@ goToRow(position: number): boolean
 
 ```ts
 let goToRowNum = 2;
-let isGoToRow = resultSet.goToRow(goToRowNum);
-console.info('resultSet.goToRow: ' + isGoToRow);
+if (resultSet != undefined) {
+  let isGoToRow = (resultSet as DataShareResultSet).goToRow(goToRowNum);
+  console.info('resultSet.goToRow: ' + isGoToRow);
+}
 ```
 
 ### getBlob
@@ -225,9 +239,11 @@ getBlob(columnIndex: number): Uint8Array
 
 ```ts
 let columnIndex = 1;
-let goToFirstRow = resultSet.goToFirstRow();
-let getBlob = resultSet.getBlob(columnIndex);
-console.info('resultSet.getBlob: ' + getBlob);
+if (resultSet != undefined) {
+  let goToFirstRow = (resultSet as DataShareResultSet).goToFirstRow();
+  let getBlob = (resultSet as DataShareResultSet).getBlob(columnIndex);
+  console.info('resultSet.getBlob: ' + getBlob);
+}
 ```
 
 ### getString
@@ -254,9 +270,11 @@ getString(columnIndex: number): string
 
 ```ts
 let columnIndex = 1;
-let goToFirstRow = resultSet.goToFirstRow();
-let getString = resultSet.getString(columnIndex);
-console.info('resultSet.getString: ' + getString);
+if (resultSet != undefined) {
+  let goToFirstRow = (resultSet as DataShareResultSet).goToFirstRow();
+  let getString = (resultSet as DataShareResultSet).getString(columnIndex);
+  console.info('resultSet.getString: ' + getString);
+}
 ```
 
 ### getLong
@@ -283,9 +301,11 @@ getLong(columnIndex: number): number
 
 ```ts
 let columnIndex = 1;
-let goToFirstRow = resultSet.goToFirstRow();
-let getLong = resultSet.getLong(columnIndex);
-console.info('resultSet.getLong: ' + getLong);
+if (resultSet != undefined) {
+  let goToFirstRow = (resultSet as DataShareResultSet).goToFirstRow();
+  let getLong = (resultSet as DataShareResultSet).getLong(columnIndex);
+  console.info('resultSet.getLong: ' + getLong);
+}
 ```
 
 ### getDouble
@@ -312,9 +332,11 @@ getDouble(columnIndex: number): number
 
 ```ts
 let columnIndex = 1;
-let goToFirstRow = resultSet.goToFirstRow();
-let getDouble = resultSet.getDouble(columnIndex);
-console.info('resultSet.getDouble: ' + getDouble);
+if (resultSet != undefined) {
+  let goToFirstRow = (resultSet as DataShareResultSet).goToFirstRow();
+  let getDouble = (resultSet as DataShareResultSet).getDouble(columnIndex);
+  console.info('resultSet.getDouble: ' + getDouble);
+}
 ```
 
 ### close
@@ -328,7 +350,9 @@ close(): void
 **示例：**
 
 ```ts
-resultSet.close();
+if (resultSet != undefined) {
+  (resultSet as DataShareResultSet).close();
+}
 ```
 
 ### getColumnIndex
@@ -355,8 +379,10 @@ getColumnIndex(columnName: string): number
 
 ```ts
 let ColumnName = "name";
-let getColumnIndex = resultSet.getColumnIndex(ColumnName);
-console.info('resultSet.getColumnIndex: ' + getColumnIndex);
+if (resultSet != undefined) {
+  let getColumnIndex = (resultSet as DataShareResultSet).getColumnIndex(ColumnName);
+  console.info('resultSet.getColumnIndex: ' + getColumnIndex);
+}
 ```
 
 ### getColumnName
@@ -383,8 +409,10 @@ getColumnName(columnIndex: number): string
 
 ```ts
 let columnIndex = 1;
-let getColumnName = resultSet.getColumnName(columnIndex);
-console.info('resultSet.getColumnName: ' + getColumnName);
+if (resultSet != undefined) {
+  let getColumnName = (resultSet as DataShareResultSet).getColumnName(columnIndex);
+  console.info('resultSet.getColumnName: ' + getColumnName);
+}
 ```
 
 ### getDataType
@@ -411,8 +439,10 @@ getDataType(columnIndex: number): DataType
 
 ```ts
 let columnIndex = 1;
-let getDataType = resultSet.getDataType(columnIndex);
-console.info('resultSet.getDataType: ' + getDataType);
+if (resultSet != undefined) {
+  let getDataType = (resultSet as DataShareResultSet).getDataType(columnIndex);
+  console.info('resultSet.getDataType: ' + getDataType);
+}
 ```
 
 ## DataType