我怎样才能类型的子控件ComboBox中MyContainer Grid的WPF?
<Grid x:Name="MyContainer">
<Label Content="Name" Name="label1" />
<Label Content="State" Name="label2" />
<ComboBox Height="23" HorizontalAlignment="Left" Name="comboBox1"/>
<ComboBox Height="23" HorizontalAlignment="Left" Name="comboBox3" />
<ComboBox Height="23" HorizontalAlignment="Left" Name="comboBox4" />
</Grid>
Run Code Online (Sandbox Code Playgroud)
这行给了我一个错误:
var myCombobox = this.MyContainer.Children.GetType(ComboBox);
Run Code Online (Sandbox Code Playgroud) 如何将这样的日期时间字符串"2017-10-13T10:53:53.000Z"作为ISODate 插入到mongo db中?插入时,我在mongodb中得到一个字符串:
datetime.strptime("2017-10-13T10:53:53.000Z", "%Y-%m-%dT%H:%M:%S.000Z")
我是一个初学者,试图将Tableau可视化嵌入到我的网页中,这样无论何时点击链接,都会在页面上呈现可视化.但浏览器加载tableauSoftware对象时出错.我该如何初始化这个对象?
我正在使用Tableau服务器试用版
<html>
<head>
<script type='text/javascript' src='http://localhost:85/javascripts/api/viz_v1.js'></script>
<script>
function initializeViz() {
var placeholderDiv = document.getElementById("tableauViz");
var url2 = "http://localhost:85/views/test_page/Sheet1?:embed=y&:display_count=no";
viz = new tableauSoftware.Viz(placeholderDiv, url2);
}
</script>
</head>
<body>
<a href="#" onclick="$('#tableauViz').html(''); initializeViz()">visualize</a>
<div class id ="tableauViz"></div>
</body>
</html>
Run Code Online (Sandbox Code Playgroud)
我收到此错误:

我正在进行一个涉及使用实体框架和asp.net mvc3在矩阵视图中显示多对多关系数据库的小项目.涉及的三个表是SalesPerson(行标签),产品(列标签)和销售:

如何在asp.net mvc3中开发/生成这种视图?
<table>
<tr>
<th></th>
@foreach (var m in Model)
{
foreach (var p in m.Products)
{
<th>@p.ProductName</th>
}
}
</tr>
@foreach (var m in Model)
{
foreach (var s in m.SalesPersons)
{
<tr>
<td>@s.PersonName</td>
</tr>
}
}
@*Sales: a.Amount*@
</table>
Run Code Online (Sandbox Code Playgroud) 我在网上找到了很多关于为备用表格行着色的文章。如果我想为各行使用不同的颜色,我该怎么做?

<table class="table1">
<tr>
<th>Name</th>
<th>Surname</th>
<th>Email</th>
</tr>
@{ foreach (var p in Model.People)
{ <tr>
<td>@p.Name</td>
<td>@p.Surname</td>
<td>@p.Number</d>
</tr>
}
}
</table>
Run Code Online (Sandbox Code Playgroud) 我是一个正在尝试 Ajax 和 Jquery 的完全菜鸟。按照网上的教程,我成功制作了一个使用MySQL作为后端数据库的搜索引擎;
<script>
$(function() {
$(".search_butn").click(function() {
// getting the value that user typed
var searchString = $("#input_box").val();
// forming the queryString
var data = 'search='+ searchString;
// if searchString is not empty
if(searchString) {
// ajax call
$.ajax({
type: "POST",
url: "search.php", //server-side script to db (mysql)
data: data,
beforeSend: function(html) { // this happens before actual call
$("#results").html('');
$("#searchresults").show();
$(".word").html(searchString);
},
success: function(html){ // this happens after we get results
$("#results").show();
$("#results").append(html);
}
});
} …Run Code Online (Sandbox Code Playgroud) 我查询数据库并将结果保存为数据帧,然后我factorize用它进行转换pivot_table.这在数据库查询返回数据时工作正常但在没有返回数据时抛出错误(这是预期的).如何捕获此异常并返回空数据帧?
#When dataframe is non-empty, transformation works fine:
print df
sale name year
0 41 Jason 2012
1 24 Molly 2012
2 31 Jason 2013
3 32 Jason 2014
4 31 Molly 2014
df['groups'] = (pd.factorize(df.year)[0] + 1).astype(str)
df1 = (df.pivot_table(index='name', columns='groups', values=['sale', 'year']))
df1.columns = [''.join(col) for col in df1.columns]
print (df1)
sale1 sale2 sale3 year1 year2 year3
name
Jason 41.0 31.0 32.0 2012.0 2013.0 2014.0
Molly 24.0 NaN 31.0 2012.0 NaN 2014.0
#But when …Run Code Online (Sandbox Code Playgroud) 我有一个调用任务的烧瓶应用程序。该任务从数据库中提取数据,绘制折线图并返回呈现在 html 页面上的 html 内容。如果没有 Celery,Flask 应用程序工作正常并在客户端呈现折线图,但现在我想委托 celery 通过RabbitMQ代理运行任务,它运行,因为我可以在 Celery shell 中看到日志输出,但生成的 html 内容永远不会被发送回到烧瓶服务器应用程序。怎么做?
#server-celery.py
app = Flask(__name__)
@app.route('/',methods=['GET'])
def index():
return render_template("index.html")
@app.route('/', methods=['GET', 'POST'])
def plotdata():
form = InputForm(request.form)
if request.method == 'POST' and form.validate():
lineChart = task.main.delay(form.startdate.data, form.enddate.data)
return render_template('view.html', form=form, result= lineChart)
if __name__ == '__main__':
app.run(host='0.0.0.0', port=5000, debug=True)
Run Code Online (Sandbox Code Playgroud)
和作为Celery工作者运行的任务:
#task.py
from celery import Celery
broker = 'amqp://localhost:5672'
app = Celery(__name__, broker=broker)
def queryDatabase(param1, param2):
#query database, return results …Run Code Online (Sandbox Code Playgroud) 在读取文件并将其插入数据库之前,我必须先将文件加载到临时位置.但是我怎么能包括一个加载gif,而它做所有这些,有人可以告诉我吗?-谢谢
<input type="file" name="myfile">
<input type="submit" id = "upload" value="Upload">
<div id= "loading_gif">
</div>
$(document).ready(function () {
$("#upload").click(function () {
$.ajax({
type: "POST",
url: "upload.php",
enctype: 'multipart/form-data',
data: {
file: myfile
},
success: function () {
alert("Data has been Uploaded: ");
}
});
});
});
<?php
$temp_location = "tmp/";
if(isset($_FILES["myfile"]))
{
if ($_FILES["myfile"]["error"] > 0)
{
echo "File loading error! ";
}
else
{
move_uploaded_file($_FILES["myfile"]["tmp_name"],
$temp_location. $_FILES["myfile"] ["name"]);
//read myfile and insert data into database
echo "File uploaded into database"; …Run Code Online (Sandbox Code Playgroud) 我有两个用于查询数据库的函数。假设有两个独立的查询,如何并行运行这些查询以查询同一数据库,并在继续执行其余代码之前,等待两个结果返回?
def query1(param1, param2):
result = None
logging.info("Connecting to database...")
try:
conn = connect(host=host, port=port, database=db)
curs = conn.cursor()
curs.execute(query)
result = curs
curs.close()
conn.close()
except Exception as e:
logging.error("Unable to access database %s" % str(e))
return result
def query2(param1, param2):
result = None
logging.info("Connecting to database...")
try:
conn = connect(host=host, port=port, database=db)
curs = conn.cursor()
curs.execute(query)
result = curs
curs.close()
conn.close()
except Exception as e:
logging.error("Unable to access database %s" % str(e))
return result
Run Code Online (Sandbox Code Playgroud) 我想通过 ssh 进入远程服务器,更改用户然后执行脚本。我正在subprocess这样做,但它似乎sudo -u userB -i没有改变用户。
HOST = 'remote_server'
USER = 'userA'
CMD = ' whoami; sudo -u userB -i; whoami'
ssh = subprocess.Popen(['ssh', '{}@{}'.format(USER, HOST),CMD],
shell=False,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
result = ssh.stdout.readlines()
if not result:
err = ssh.stderr.readlines()
print('ERROR: {}'.format(err))
else:
print "success"
print(result)
$ success
$ ['userA\n', 'userA\n']
Run Code Online (Sandbox Code Playgroud)
当我替换为 时CMD ='sudo -u userB -i && whoami',出现此错误:
错误:['sudo:抱歉,你必须有一个 tty 才能运行 sudo\n']
在终端上,我可以进行无密码 ssh, sudo -u userB -i && whoami
如何添加文本注释并将绘制的点和数值标记到pandas数据帧的matplotlib图中?数据帧的列不是固定大小,因不同文件而异.
dataframe = pd.read_csv('file1.csv')
plt.figure(figsize=(50,25))
dataframe.plot()
plt.xticks(rotation=45, fontsize=8)
plt.yticks(fontsize=8)
Run Code Online (Sandbox Code Playgroud) 我很难理解 Postgres json 数组类型。如何使用 json 数组列进行分组。例如:
select product, avg(sales)
from Order
group by product
Run Code Online (Sandbox Code Playgroud)
“错误:无法识别 json 类型的相等运算符”
--Order--
id | sales | product
1 | 36 | ["874746", "474657"]
2 | 120 | ["874748"]
3 | 15 | ["874736", "474654"]
Run Code Online (Sandbox Code Playgroud) python ×6
html ×3
ajax ×2
asp.net-mvc ×2
c# ×2
pandas ×2
arrays ×1
celery ×1
css ×1
database ×1
flask ×1
javascript ×1
jquery ×1
json ×1
matplotlib ×1
matrix ×1
php ×1
postgresql ×1
pymongo ×1
razor ×1
rest ×1
solr ×1
ssh ×1
sudo ×1
tableau-api ×1
tty ×1
wpf ×1
wpf-controls ×1