How to add a new Model visually in Mac OS visual Studio

2022-05-06 23:28 mercury imported from Stackoverflow

I do not see any choice to create a model in Mac visual studio? I In the windows version the Class created with its imports

using Linq

using Threading.Tasks

using Collection.Generic

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How do I add new DataSource to an already Databinded CheckBoxList

i'm building a web form that show Database's item(Tables, Rows, FK,...)

I have a CheckBoxList of Tables (chkListTable) which will show a new CheckBoxList of Rows (chkListRow) everytime I SelectedIndexChanged from chkListTable. The problem is i can show the items from chkListTable with 1 selected item. But i don't know how to show chkListRow if multiple item from chkListTable are selected.

Here are my codes:

aspx:

<div>
             <asp:Label ID="Label2" runat="server" Text="Table: "></asp:Label>
             <asp:CheckBoxList ID="chkListTable" runat="server"
                 DataTextField="name"
                 DataValueFeild="name"
                 AutoPostBack="true"
                 OnSelectedIndexChanged="chkListTable_SelectedIndexChanged">
             </asp:CheckBoxList>
        </div>
        <div>
             <asp:CheckBoxList ID="chkListRow" runat="server"
             DataTextField="COLUMN_NAME"
             DataValueField="COLUMN_NAME"
             RepeatDirection="Horizontal">
             </asp:CheckBoxList>
        </div>

aspx.cs:

protected void chkListTable_SelectedIndexChanged(object sender, EventArgs e)
    {
        tableName.Clear();
        
        foreach (ListItem item in chkListTable.Items)
        {
            if(item.Selected)
            {
                tableName.Add(item.Text.Trim());
            }    
        }

        for(int i = 0; i < tableName.Count; i++)
        {
            String query = "USE " + dbname +
                " SELECT * FROM information_schema.columns" +
                " WHERE table_name = '" + tableName[i] + "'" +
                " AND COLUMN_NAME != 'rowguid'";
            chkListRow.DataSource = Program.ExecSqlDataReader(query);
            chkListRow.DataBind(); 
            Program.conn.Close();
        }
    }

Program.cs:

public static bool Connect()
    {
        if (Program.conn != null && Program.conn.State == ConnectionState.Open)
            Program.conn.Close();
        try
        {
            Program.conn.ConnectionString = Program.constr;

            Program.conn.Open();

            return true;
        }

        catch (Exception e)
        {
            return false;
        }
    }

    public static SqlDataReader ExecSqlDataReader(String query)
    {
        SqlDataReader myreader;
        SqlCommand sqlcmd = new SqlCommand(query, Program.conn);
        sqlcmd.CommandType = CommandType.Text;
        if (Program.conn.State == ConnectionState.Closed) Program.conn.Open();
        try
        {
            myreader = sqlcmd.ExecuteReader();
            return myreader;
            myreader.Close();
        }
        catch (SqlException ex)
        {
            Program.conn.Close();
            return null;
        }
    }

I want my display to be like this:

[x]Table1 [x]Table2 [ ]Table3
[ ]Row1(Table1) [ ]Row2(Table1) [ ]Row3(Table1)
[ ]Row1(Table2) [ ]Row2(Table2)

Writing multithreaded code to generate incremental index

I want to write a code in following scenario : we want to design an invoice generator.this invoice generator also generates an incremental invoice no .Also note that for some reasons we dont use something like sql Auto Increment here and we want to use C# (I wrote the increment logic). since several users can send requests at a time it means that we dont have to give the same invoice no to them (I used lock for it and I wrote it).

Now i have written increment logic. and i take care of multiple users requests with lock . and I wrote CRUD for mongodb database.

My problem is that my increent logic is naive. each time i find maximum and i increment by one which is not scalable. and another problem is that when we delete a record we don't want the invoice no to be repeated and since we find max if the deleted record had the max value then the invoice no would be duplicate and this is something we don't want to have.

I really don't know how to handle the problem. specially in case of deletion should i store max values in a file or should i change increment logic completely?

i appreciate any help

Scraping .aspx page with Python yields 404

I'm a web-scraping beginner and am trying to scrape this webpage: https://profiles.doe.mass.edu/statereport/ap.aspx

I'd like to be able to put in some settings at the top (like District, 2020-2021, Computer Science A, Female) and then download the resulting data for those settings.

Here's the code I'm currently using:

import requests
from bs4 import BeautifulSoup

url = 'https://profiles.doe.mass.edu/statereport/ap.aspx'
with requests.Session() as s:
    s.headers['User-Agent'] = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:100.0) Gecko/20100101 Firefox/100.0"
    r = s.get('https://profiles.doe.mass.edu/statereport/ap.aspx')
    soup = BeautifulSoup(r.text,"lxml")
    data = {i['name']:i.get('value','') for i in soup.select('input[name]')}
    
    
    data["ctl00$ContentPlaceHolder1$ddReportType"]="DISTRICT",
    data["ctl00$ContentPlaceHolder1$ddYear"]="2021",
    data["ctl00$ContentPlaceHolder1$ddSubject"]="COMSCA",
    data["ctl00$ContentPlaceHolder1$ddStudentGroup"]="F",
    
    p = s.post(url,data=data)

When I print out p.text, I get a page with title '\t404 - Page Not Found\r\n' and message

<h2>We are unable to locate information at: <br /><br '
 '/>http://profiles.doe.mass.edu:80/statereport/ap.aspxp?ASP.NET_SessionId=bxfgao54wru50zl5tkmfml00</h2>\r\n'

Here's what data looks like before I modify it:

{'__EVENTVALIDATION': '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',
 '__VIEWSTATE': '/wEPDwUKLTM0NzY4OTQ4NmRkDwwPzTpuna+yxVhQxpRF4n2+zYKQtotwRPqzuCkRvyU=',
 '__VIEWSTATEGENERATOR': '2B6F8D71',
 'ctl00$ContentPlaceHolder1$btnViewReport': 'View Report',
 'ctl00$ContentPlaceHolder1$hfExport': 'ViewReport',
 'leftNavId': '11241',
 'quickSearchValue': '',
 'runQuickSearch': 'Y',
 'searchType': 'QUICK',
 'searchtext': ''}

Following suggestions from similar questions, I've tried playing around with the parameters, editing data in various ways (to emulate the POST request that I see in my browser when I navigate the site myself), and specifying an ASP.NET_SessionId, but to no avail.

How can I access the information from this website?

site only opens in CefSharp

zaakr.net is a site can be opened only in zaakr.exe application or through android(.apk), when opened in browser u been redirected to https://browser.zaakr.net so u download there application, (.exe) file is using cefsharp as a browser so it can access website, from 2 month i could open it from chromium as cefsharp uses chromium, now i can't access website through chromium for some reason idk, i even made a cefsharp browser myself using visual studio nothing worked all the time i been redirected to browser.zaakr.com, i want to access through any browser that have devtools available for a project, note that application zaakr.exe is still using cefsharp even the older version still can access site. i would appreciate any help, sry for any spelling mistakes, thanks.
C# MariaDB Update Function working in DataStore but not updating in .NET Application
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```
string _connectionString = "validConnectionstring";

using (MySqlConnection _mySqlConnection = new MySqlConnection(_connectionString)
{
_mySqlConnection.Open();
using (MySqlCommand command = new MySqlCommand("UpdateProfileStatus", _mySqlConnection))
{
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```
I get no updates in my database but my console logs that the query is executed returning the value of 1 but there is no update that actually happens in my DB. Is there something in my code to reason why it is failing?

Here is the stored procedure that I have for the update command
```
CREATE PROCEDURE UpdateProfileStatus(_username VARCHAR(25), _status BOOL)
UPDATE Profile SET status = _status WHERE username = _username;
```
I know the Stored Procedure works but am not sure why my .NET application is not responding to my procedure call. Is it something to do with my implementation of the parameters or is it my procedure itself?

Image of DataStore Setting within MariaDB
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I cannot find any error in the output windows in visual studio.

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Previously I considered maybe it is the problem of my Visual Studio or Operation System.

However, after I reinstalled my Visual Studio and even reinstalled my Operation System, the problem is still here.

Soon I found a topic may relate my problem:Git has stopped working after installing VS 2022

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C# - Adding condition to func results in stack overflow exception
I have a func as part of specification class which sorts the given iqueryable
```
Func<IQueryable<T>, IOrderedQueryable<T>>? Sort { get; set; }
```
When i add more than one condition to the func like below , it results in stack overflow exception.
```
spec.OrderBy(sc => sc.Case.EndTime).OrderBy(sc => sc.Case.StartTime);
```
The OrderBy method is implemented like this
```
public ISpecification<T> OrderBy<TProperty>(Expression<Func<T, TProperty>> property)
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Chaining or using separate lines doesn't make a difference.

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How to get only one question to the preview page in survey management website in angular?
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Querystring
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Related questions

How to add a new Model visually in Mac OS visual Studio

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