System.ArgumentException: Format of the initialization string does not conform to specification starting at index 0.
for .net CORE users :
make sure to configure the program.cs first
mine look like this
var builder = WebApplication.CreateBuilder(args);
var myAllowSpecificOrigins = "_myAllowSpecificOrigins";
// Add services to the container.
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddDbContext<DataContext>(option =>
{
option.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection"));
});
// Enable CORS
builder.Services.AddCors(options =>
{
options.AddPolicy(name: myAllowSpecificOrigins,
builder =>
{
builder.WithOrigins("http://localhost:4200")
.AllowAnyMethod()
.AllowAnyHeader();
});
});
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.UseCors(myAllowSpecificOrigins);
app.UseAuthorization();
app.MapControllers();
app.Run();