Question

这里和两个变量存储两个表数据现在，我想通过Foreach循环将这些表添加到DataTable中吗？

$ sudo yarn feed
yarn run v1.12.3
$ node scripts/feed.js
(node:2527) UnhandledPromiseRejectionWarning: FetchError: invalid json response body at     
https://hoversport.no/api/catalog/hoversport.no/product/_search?size=9000&from=0&sort=&_source_exclude=configurable_children%2Cconfigurable_options%2Csgn&_source_include=type_id%2Csku%2Cproduct_links%2Ctax_class_id%2Cspecial_price%2Cspecial_to_date%2Cspecial_from_date%2Cname%2Cprice%2CpriceInclTax%2CoriginalPriceInclTax%2CoriginalPrice%2CspecialPriceInclTax%2Cid%2Cimage%2Csale%2Cnew%2Curl_key%2Cstatus%2Ctier_prices%2Cdescription 
reason: Unexpected token < in JSON at position 0
at /opt/bitnami/apps/hoversport.no/vue-storefront/node_modules/node-fetch/lib/body.js:48:31
at <anonymous>
at process._tickCallback (internal/process/next_tick.js:189:7)
(node:2527) UnhandledPromiseRejectionWarning: Unhandled promise rejection. 
This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:2527) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
Done in 0.35s.

Answer 1

如果要从每个表中获取所有列，可以执行以下操作：

var newTable = new DataTable();
//Copy the meter table into your new table
newTable = meterData.Copy();
//Use .Merge to merge in the level table
newTable.Merge(levelData);

如果要添加新行，请创建一个数据行并将其添加到数据表中：

// Create new DataRow objects and add to DataTable.    
for(int i = 0; i < someNumberOfRows; i++)
{
    row = newTable.NewRow();
    row["column1"] = i;
    row["column2"] = "item " + i.ToString();
    newTable.Rows.Add(row);
}

如果您需要使用foreach，我假设您要迭代2个表中的行：

foreach(DataRow r in meterData.Rows)
{
   row = newTable.NewRow();
   row["someColumn"] = r["someColumn"];
   row["someOtherColumn"] = r["someOtherColumn"];
   newTable.Rows.Add(row);
}

Answer 2

您可以像这样通过new row循环添加foreach

  var dataTable = new DataTable();
  dataTable.Columns.Add("Meter", typeof(string));
  dataTable.Columns.Add("Volume", typeof(int));

foreach (var items in Source) //source is the where you want to loop
{
DataRow row = dataTable.NewRow();
row["Meter"] = "meter"; 
//you can access value of source items through item.NameofTargetField like items.meter  
row["Volume"] = 11;
dataTable.Rows.Add(row);
}

如何在DataTable中添加具有多个值的这两个变量？

2 个答案: