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Mobile number already exist or not in C#

  mobile number already exists Private bool CheckMobNoExistOrNot (string MobileNo)         {             bool ReturnVal = false;             try             {                 if (objCon.State != ConnectionState.Open)                     ObjCon.Open();                 using (SqlCommand cmd = new SqlCommand("select COUNT(*) from tablename where ContactNo=@MobNo ", ObjCon))                 {                     cmd.Parameters.AddWithValue("@MobNo", MobileNo);                     object Obj = cmd.ExecuteScalar();                     if (Obj != ...
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How to Create Dynamic Table in C#

 Create a DataTable object Add Columns Using Add Method Create the object on Row DataTable objdt  = new DataTable();                         dtUnits.Columns.Add("ABCNo",typeof(string));                         dtUnits.Columns.Add("UserName", typeof(string)); var row = objdt  .NewRow();                                 row["ABCNo"] =   ItemNO;                                 row["UserName"] = Aranav;                                 dtUnits.Rows.Add(row);
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How to get IP Of Client machine in ASP.Net

IP Of Client machine the following function is used to get IP of Client Machine Public string GetIPOfClient()         {             string returnvalue = string.Empty;             try             {                 System.Web.HttpContext context = System.Web.HttpContext.Current;                 string ip = context.Request.ServerVariables[" HTTP_X_FORWARDED_FOR "];                 returnvalue = context.Request.ServerVariables[" REMOTE_ADDR "];                 if (!string.IsNullOrEmpty(ip))                 {                     string[] addresses = ip.Split(',');           ...
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refreshing data without page refresh in Angular 7

Refreshdata() { this.datarefresher=SetInterval(() =>{ },30000); }
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new row create using array in Angular 7

Create html button  Call click event  Create on two array  Example  Rack:any newAttribute:any={}; <button class="add" (click)="Addnewrow()">Add</button> Function- Addnewrow(){ this.rack.push(this.newAttribute) this.NewAttribute={}; }
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String Program in C#

using System; using System.Linq; 1)Reverse Name String  in C# String Name="Sudam"; int Len=Name.Length-1; while(Len>=0) { Console.Write(Name[Len]); Len--; } ----------------------------------------- Output --madus ----------------------------------------- 2)Reverse Words of a String in C# string s = "I Name Is Sudam"; string[] a = s.Split(' '); int temp= a.Length - 1; while (temp >= 0) {     Console.Write(a[temp] + ' ');     temp--; } ------------------------------------------ Output --Sudam Is Name I ---------------------------------------- 3) How to Fine count how many double letters are in a string? int doubleLetters = 0; string characters = "Hello"; for (int i = 0; i < characters.Length - 1; i++) {     if (characters[i] == characters[i + 1])     {         doubleLetters++;         i++;     }     Console.WriteLine(doubleLetters); } -----------------------------------------...
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Api

  --- Step-by-Step: API Call with Bearer Token Header --- ✅ STEP 1: Add a Config Class for Token (Optional but Clean) File: AppConfig.cs (root folder) namespace ApiConsoleApp {     public static class AppConfig     {         // You can load this from config file or env variable too         public static string BearerToken = "YOUR_DYNAMIC_BEARER_TOKEN_HERE";         public static string ApiBaseUrl = "https://your-api-base-url.com/";     } } --- ✅ STEP 2: Modify API Client to Use Bearer Token File: ApiClients/UserApiClient.cs using System; using System.Net.Http; using System.Net.Http.Headers; using System.Text; using System.Threading.Tasks; using ApiConsoleApp.Models; using Newtonsoft.Json; namespace ApiConsoleApp.ApiClients {     public class UserApiClient     {         private readonly HttpClient _httpClient;         public UserApiCli...
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Oracle database

 using System; using System.Data; using Oracle.ManagedDataAccess.Client; class Program {     static void Main()     {         string connectionString = "User Id=your_username;Password=your_password;Data Source=your_datasource";         using (OracleConnection conn = new OracleConnection(connectionString))         {             try             {                 conn.Open();                 Console.WriteLine("Connected to Oracle Database.");                 string query = "SELECT * FROM your_table"; // Change to your actual query                 using (OracleCommand cmd = new OracleCommand(query, conn))                 using (OracleDataReader reader ...
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