Retrieve/fetch records from DYNAMICS 365 crm using C# code

Question

• Problem 1:

  I am new to MICROSOFT DYNAMICS CRM 365. I have few tables with my CRM like(Account,Customer).I want to fetch all data from table account.

Below is my sample code for connection:(not sure this is correct or not but getting output message that i am connected to CRM)

public void ConnectToMSCRM(string UserName, string Password, string SoapOrgServiceUri)  
    {  
        try  
        {  
            ClientCredentials credentials = new ClientCredentials();  
            credentials.UserName.UserName = UserName;  
            credentials.UserName.Password = Password;  
            Uri serviceUri = new Uri(SoapOrgServiceUri);  
            OrganizationServiceProxy proxy = new OrganizationServiceProxy(serviceUri, null, credentials, null);  
            proxy.EnableProxyTypes();  
            _services = (IOrganizationService)proxy;  
            Response.Write("Connected to CRM \n");  
}  

I need all data to be retrieved on button click event .
Output should be: result of "select * from ABC";

• Problem 2:

if possible please suggest how to fetch records using given column name.
Output should be: result of "select * from ABC where ColumnName="test";

Answer 1

Fetching all entities list into List

    var allEntities = **GetEntities(_service);**
    foreach (var Entity in allEntities)
    {
        ddlEntityName.Items.Add(Entity.LogicalName);
    }

//Function with single parameter (oganizationservice as a parameter)

//This will fetch Table/Entity Name Like ACCOUNT,CONTACT from Microsoft Dynamics CRM

public Microsoft.Xrm.Sdk.Metadata.EntityMetadata[] GetEntities(IOrganizationService organizationService)
    {
        Dictionary<string, string> attributesData = new Dictionary<string, string>();
        RetrieveAllEntitiesRequest metaDataRequest = new RetrieveAllEntitiesRequest();
        RetrieveAllEntitiesResponse metaDataResponse = new RetrieveAllEntitiesResponse();
        metaDataRequest.EntityFilters = EntityFilters.Entity;

        XmlDictionaryReaderQuotas myReaderQuotas = new XmlDictionaryReaderQuotas();
        myReaderQuotas.MaxNameTableCharCount = 2147483647;

        // Execute the request.

        metaDataResponse = (RetrieveAllEntitiesResponse)organizationService.Execute(metaDataRequest);

        var entities = metaDataResponse.EntityMetadata;

        return entities.OrderBy(x => x.LogicalName).ToArray();//to arrange in ascending order
    }