Develop Reference

Access multiple databases from winforms without adding datasource

I am creating a test app in VS C# to allow production to search for product information within a database and to create a csv file. The app currently works with 1 AccessDB which I added as a datasource in the IDE Data tab.
There is ~50 product databases and having to add each of these in the datasource tab is not viable especially if there are new databases created later on.
I was hoping something like the following would be possible to pass the databasePath as a parameter.
databasePath = txtBox.Text;
OleDbConnection conn1 = new OleDbConnection(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=databasePath");
Is it possible to do this without having to go to the IDE and add a new datasource?

If all the databases have the exact same tables and columns and you are using TableAdapter try the following out.
Caveat It appears the following will not work when changing the connection string after the form has loaded. If you were to change it in a main form than open a child form the connection string works but not when changing the connection string in the same form as the TableAdapter. Best guess is connection string is set when the form initializes thus does not see the changed connection string.
Usage
var source = Path.Combine(ConnectionHelper.BasePath, "Database1.accdb");
ConnectionHelper.ChangeConnection(source,2);
Change BasePath to match your path to the databases.
using System.Configuration;
using System.Data.OleDb;
using System.IO;
using static System.Configuration.ConfigurationManager;
namespace AccessMultiConnections.Classes
{
public class ConnectionHelper
{
/// <summary>
/// Location of all databases
/// </summary>
public static string BasePath =
"C:\\Dotnetland\\Databases";
/// <summary>
/// Change database connection by index in connection string section
/// </summary>
/// <param name="source">Path and database name</param>
/// <param name="index">ordinal index of connection string</param>
/// <remarks>
/// Can change index parameter to a string name representing the connection
/// string if desire.
/// </remarks>
public static void ChangeConnection(string source, int index)
{
var config = OpenExeConfiguration(ConfigurationUserLevel.None);
var connectionStringsSection = (ConnectionStringsSection)config
.GetSection("connectionStrings");
// in this case the index to the connection string is 2
var current = connectionStringsSection.ConnectionStrings[index]
.ConnectionString;
var builder = new OleDbConnectionStringBuilder(current)
{
DataSource = source
};
connectionStringsSection.ConnectionStrings[index].ConnectionString =
builder.ConnectionString;
config.Save();
RefreshSection("connectionStrings");
Properties.Settings.Default.Reload();
}
/// <summary>
/// Provides the current database name without a path in appsettings.config
/// </summary>
/// <returns>File name for current connection</returns>
public static string CurrentConnectionString()
{
var config = OpenExeConfiguration(ConfigurationUserLevel.None);
var connectionStringsSection = (ConnectionStringsSection)config
.GetSection("connectionStrings");
var builder =
new OleDbConnectionStringBuilder(
connectionStringsSection.ConnectionStrings[2]
.ConnectionString);
return Path.GetFileName(builder.DataSource);
}
}
}
Edit - noticed I hard coded the connection string in CurrentConnectionString, here is the proper code.
/// <summary>
/// Provides the current database name without a path in appsettings.config
/// </summary>
/// <param name="index">ordinal index of connection string</param>
/// <returns>File name for current connection</returns>
public static string CurrentConnectionString(int index = 2)
{
var config = OpenExeConfiguration(ConfigurationUserLevel.None);
var connectionStringsSection = (ConnectionStringsSection)config
.GetSection("connectionStrings");
var builder =
new OleDbConnectionStringBuilder(
connectionStringsSection.ConnectionStrings[index]
.ConnectionString);
return Path.GetFileName(builder.DataSource);
}

DSN Creation using C# windows application form

HI everyone i am beginner in C# so i need help. I am making C# windows application forms and using Class and used a Button to call a class but i dont know how to call a class by clicking button. help will be appreciated. i am creating another form and only 1 button it contains, the DSN NAME i want to create is "Fassets" Database name is also Fassets
enter image description here
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace dsn
{
public static class Class1
{
private const string ODBC_INI_REG_PATH = "SOFTWARE\\ODBC\\ODBC.INI\\";
private const string ODBCINST_INI_REG_PATH = "SOFTWARE\\ODBC\\ODBCINST.INI\\";
/// <summary>
/// Creates a new DSN entry with the specified values. If the DSN exists, the values are updated.
/// </summary>
/// <param name="dsnName">Name of the DSN for use by client applications</param>
/// <param name="description">Description of the DSN that appears in the ODBC control panel applet</param>
/// <param name="server">Network name or IP address of database server</param>
/// <param name="driverName">Name of the driver to use</param>
/// <param name="trustedConnection">True to use NT authentication, false to require applications to supply username/password in the connection string</param>
/// <param name="database">Name of the datbase to connect to</param>
public static void CreateDSN(string dsnName, string description, string server, string driverName, bool trustedConnection, string database)
{
// Lookup driver path from driver name
var driverKey = Registry.LocalMachine.CreateSubKey(ODBCINST_INI_REG_PATH + driverName);
if (driverKey == null) throw new Exception(string.Format("ODBC Registry key for driver '{0}' does not exist", driverName));
string driverPath = driverKey.GetValue("Driver").ToString();
// Add value to odbc data sources
var datasourcesKey = Registry.LocalMachine.CreateSubKey(ODBC_INI_REG_PATH + "ODBC Data Sources");
if (datasourcesKey == null) throw new Exception("ODBC Registry key for datasources does not exist");
datasourcesKey.SetValue(dsnName, driverName);
// Create new key in odbc.ini with dsn name and add values
var dsnKey = Registry.LocalMachine.CreateSubKey(ODBC_INI_REG_PATH + dsnName);
if (dsnKey == null) throw new Exception("ODBC Registry key for DSN was not created");
dsnKey.SetValue("Fassets", database);
dsnKey.SetValue("Description", description);
dsnKey.SetValue("driverPath", driverPath);
dsnKey.SetValue("LastUser", Environment.UserName);
dsnKey.SetValue("Server", server);
dsnKey.SetValue("Database", database);
dsnKey.SetValue("Trusted_Connection", trustedConnection ? "Yes" : "No");
}
/// <summary>
/// Removes a DSN entry
/// </summary>
/// <param name="dsnName">Name of the DSN to remove.</param>
public static void RemoveDSN(string dsnName)
{
// Remove DSN key
Registry.LocalMachine.DeleteSubKeyTree(ODBC_INI_REG_PATH + dsnName);
// Remove DSN name from values list in ODBC Data Sources key
var datasourcesKey = Registry.LocalMachine.CreateSubKey(ODBC_INI_REG_PATH + "ODBC Data Sources");
if (datasourcesKey == null) throw new Exception("ODBC Registry key for datasources does not exist");
datasourcesKey.DeleteValue(dsnName);
}
///<summary>
/// Checks the registry to see if a DSN exists with the specified name
///</summary>
///<param name="dsnName"></param>
///<returns></returns>
public static bool DSNExists(string dsnName)
{
var driversKey = Registry.LocalMachine.CreateSubKey(ODBCINST_INI_REG_PATH + "ODBC Drivers");
if (driversKey == null) throw new Exception("ODBC Registry key for drivers does not exist");
return driversKey.GetValue(dsnName) != null;
}
///<summary>
/// Returns an array of driver names installed on the system
///</summary>
///<returns></returns>
public static string[] GetInstalledDrivers()
{
var driversKey = Registry.LocalMachine.CreateSubKey(ODBCINST_INI_REG_PATH + "ODBC Drivers");
if (driversKey == null) throw new Exception("ODBC Registry key for drivers does not exist");
var driverNames = driversKey.GetValueNames();
var ret = new List<string>();
foreach (var driverName in driverNames)
{
if (driverName != "(Default)")
{
ret.Add(driverName);
}
}
return ret.ToArray();
}
}
}

If I understand your question correctly you would like to bind a 'click' event to a button and run a method from your class Class. Just double click the button in the designer and you will be let to a just created function. In this function you can call the function from your class.
Please note!
Please never use Class as name of a class. It's a reserved word. https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/

How to create nested fields using C# Interop.Word (IF option with MailMerge Fields)

I am trying to set MailMerge fields and let Word fill them for me, which isn't a Problem at all... What i am looking to do and can't figure out is the following, I want to set 2 MailMergeFields in 1 place and let Word sort it out for me.
In this case have a mergefield for PO_Box and Adress, if there is a PO_Box # use it, otherwise use the Standard Adress.
Example of the MailMerge what it would look like in Word:
{ IF { MERGEFIELD PO_Box } > "1" "{ MERGEFIELD PO_Box }" "{ MERGEFIELD Adress }" \* MERGEFORMAT }
Is there a way to make this happen thru some Word Interop Funktion?
Edit:
static void Main(string[] args)
{
object fileName = #"C:\test.docx";
string dataSource = #"C:\Test.csv";
Word.Selection wrdSelection;
Word.MailMerge wrdMailMerge;
Word.MailMergeFields wrdMergeFields;
// Start Word Application
Word.Application wrdApp = new Word.Application();
//Load a document
Word.Document wrdDoc = wrdApp.Documents.Add(ref fileName, Visible: true);
wrdSelection = wrdApp.Selection;
wrdMailMerge = wrdDoc.MailMerge;
// Open Data Source from .csv file
wrdDoc.MailMerge.OpenDataSource(dataSource);
//Create MergeFields
wrdSelection.ParagraphFormat.Alignment = Word.WdParagraphAlignment.wdAlignParagraphLeft;
wrdSelection.ParagraphFormat.LineSpacingRule = Word.WdLineSpacing.wdLineSpaceSingle;
wrdSelection.ParagraphFormat.SpaceAfter = 0.0F;
wrdMergeFields = wrdMailMerge.Fields;
wrdMergeFields.Add(wrdSelection.Range, "Title");
wrdSelection.TypeText(" ");
wrdMergeFields.Add(wrdSelection.Range, "FirstName");
wrdSelection.TypeText(" ");
wrdMergeFields.Add(wrdSelection.Range, "LastName");
wrdSelection.TypeParagraph();
// Here I want to combine this Field with a PO_Box and let Word
// do the trick
wrdMergeFields.Add(wrdSelection.Range, "Address");
wrdSelection.TypeParagraph();
wrdMergeFields.Add(wrdSelection.Range, "City");
wrdSelection.TypeText(", ");
wrdMergeFields.Add(wrdSelection.Range, "State");
wrdSelection.TypeText(" ");
wrdMergeFields.Add(wrdSelection.Range, "Zip");
wrdSelection.ParagraphFormat.LineSpacingRule = Word.WdLineSpacing.wdLineSpaceDouble;
insertLines(wrdApp, 2);
//Right justify the line and insert a date field with current date.
wrdSelection.ParagraphFormat.Alignment = Word.WdParagraphAlignment.wdAlignParagraphRight;
object objDate = "dd.MM.yyyy";
wrdSelection.InsertDateTime(ref objDate);
//Preview the final merge
wrdDoc.MailMerge.Destination = Word.WdMailMergeDestination.wdSendToNewDocument;
wrdDoc.MailMerge.Execute();
//Close Template
object saveOption = Word.WdSaveOptions.wdDoNotSaveChanges;
wrdDoc.Close(ref saveOption);
//Shows the Application after the process to the User
wrdApp.Visible = true;
}
public static void insertLines(Word.Application wrdApp, int LineNum)
{
int iCount;
// Insert "LineNum" blank lines.
for (iCount = 1; iCount <= LineNum; iCount++)
{
wrdApp.Selection.TypeParagraph();
}
}
So this basicly what I have, now i need the Adress MergeField to behave as i described above, since I will receive a .csv data from another programm that i can't modify I would like to place this field in Word that it will sort out if there is a PO Box or Adress.

So, what you really want is to create the nested field codes. There are two basic approaches for this:
Record a macro while doing it as a user as the basis. This relies on the Selection object, which can be tricky; the approach is not scalable (only works for that specific combination). This is described on StackOverflow, so I won't repeat it here: Setting up a nested field in Word using VBA
Insert the field as a string, using "placeholders" to indicate
where the field codes are, then convert the placeholders to field
codes. This is scalable: it can be used for any combination of
fields. There is an excellent algorithm in C# posted on GitHub, by Florian Wolters in response to a discussion in which I participated on MSDN. I copy it below for convenience.
https://gist.github.com/FlorianWolters/6257233
//------------------------------------------------------------------------------
// <copyright file="FieldCreator.cs" company="Florian Wolters">
// Copyright (c) Florian Wolters. All rights reserved.
// </copyright>
// <author>Florian Wolters <wolters.fl#gmail.com></author>
//------------------------------------------------------------------------------
namespace FlorianWolters.Office.Word.Fields
{
using System;
using System.Collections;
using System.Runtime.InteropServices;
using Word = Microsoft.Office.Interop.Word;
/// <summary>
/// The class <see cref="FieldCreator"/> simplifies the creation of <see cref="Word.Field"/>s.
/// </summary>
public class FieldCreator
{
/// <summary>
/// Adds one or more new <see cref="Word.Field"/> to the specified <see cref="Word.Range"/>.
/// <para>
/// This method allows to insert nested fields at the specified range.
/// </para>
/// <example>
/// <c>InsertField(Application.Selection.Range, {{= {{PAGE}} - 1}};</c>
/// will produce
/// { = { PAGE } - 1 }
/// </example>
/// </summary>
/// <param name="range">The <see cref="Word.Range"/> where to add the <see cref="Word.Field"/>.</param>
/// <param name="theString">The string to convert to one or more <see cref="Word.Field"/> objects.</param>
/// <param name="fieldOpen">The special code to mark the start of a <see cref="Word.Field"/>.</param>
/// <param name="fieldClose">The special code to mark the end of a <see cref="Word.Field"/>.</param>
/// <returns>The newly created <see cref="Word.Field"/></returns>
/// <remarks>
/// A solution for VBA has been taken from this
/// article and adopted for C# by the author.
/// </remarks>
public Word.Field InsertField(
Word.Range range,
string theString = "{{}}",
string fieldOpen = "{{",
string fieldClose = "}}")
{
if (null == range)
{
throw new ArgumentNullException("range");
}
if (string.IsNullOrEmpty(fieldOpen))
{
throw new ArgumentException("fieldOpen");
}
if (string.IsNullOrEmpty(fieldClose))
{
throw new ArgumentException("fieldClose");
}
if (!theString.Contains(fieldOpen) || !theString.Contains(fieldClose))
{
throw new ArgumentException("theString");
}
// Special case. If we do not check this, the algorithm breaks.
if (theString == fieldOpen + fieldClose)
{
return this.InsertEmpty(range);
}
// TODO Implement additional error handling.
// TODO Possible to remove the dependency to state capture?
using (new StateCapture(range.Application.ActiveDocument))
{
Word.Field result = null;
Stack fieldStack = new Stack();
range.Text = theString;
fieldStack.Push(range);
Word.Range searchRange = range.Duplicate;
Word.Range nextOpen = null;
Word.Range nextClose = null;
Word.Range fieldRange = null;
while (searchRange.Start != searchRange.End)
{
nextOpen = this.FindNextOpen(searchRange.Duplicate, fieldOpen);
nextClose = this.FindNextClose(searchRange.Duplicate, fieldClose);
if (null == nextClose)
{
break;
}
// See which marker comes first.
if (nextOpen.Start < nextClose.Start)
{
nextOpen.Text = string.Empty;
searchRange.Start = nextOpen.End;
// Field open, so push a new range to the stack.
fieldStack.Push(nextOpen.Duplicate);
}
else
{
nextClose.Text = string.Empty;
// Move start of main search region onwards past the end marker.
searchRange.Start = nextClose.End;
// Field close, so pop the last range from the stack and insert the field.
fieldRange = (Word.Range)fieldStack.Pop();
fieldRange.End = nextClose.End;
result = this.InsertEmpty(fieldRange);
}
}
// Move the current selection after all inserted fields.
// TODO Improvement possible, e.g. by using another range object?
int newPos = fieldRange.End + fieldRange.Fields.Count + 1;
fieldRange.SetRange(newPos, newPos);
fieldRange.Select();
// Update the result of the outer field object.
result.Update();
return result;
}
}
/// <summary>
/// Adds a new empty <see cref="Word.Field"/> to the specified <see cref="Word.Range"/>.
/// </summary>
/// <param name="range">The <see cref="Word.Range"/> where to add the <see cref="Word.Field"/>.</param>
/// <param name="preserveFormatting">
/// Whether to apply the formatting of the previous <see cref="Word.Field"/> result to the new result.
/// </param>
/// <returns>The newly created <see cref="Word.Field"/>.</returns>
public Word.Field InsertEmpty(Word.Range range, bool preserveFormatting = false)
{
Word.Field result = this.AddFieldToRange(range, Word.WdFieldType.wdFieldEmpty, preserveFormatting);
// Show the field codes of an empty field, because otherwise we can't be sure that it is visible.
result.ShowCodes = true;
return result;
}
/// <summary>
/// Creates a <see cref="Word.Field"/> and adds it to the specified <see cref="Word.Range"/>
/// </summary>
/// <remarks>
/// The <see cref="Word.Field"/> is added to the <see cref="Word.Fields"/> collection of the specified <see
/// cref="Word.Range"/>.
/// </remarks>
/// <param name="range">The <see cref="Word.Range"/> where to add the <see cref="Word.Field"/>.</param>
/// <param name="type">The type of <see cref="Word.Field"/> to create.</param>
/// <param name="preserveFormatting">
/// Whether to apply the formatting of the previous field result to the new result.
/// </param>
/// <param name="text">Additional text needed for the <see cref="Word.Field"/>.</param>
/// <returns>The newly created <see cref="Word.Field"/>.</returns>
private Word.Field AddFieldToRange(
Word.Range range,
Word.WdFieldType type,
bool preserveFormatting = false,
string text = null)
{
return range.Fields.Add(
range,
type,
(null == text) ? Type.Missing : text,
preserveFormatting);
}
private Word.Range FindNextOpen(Word.Range range, string text)
{
Word.Find find = this.CreateFind(range, text);
Word.Range result = range.Duplicate;
if (!find.Found)
{
// Make sure that the next closing field will be found first.
result.Collapse(Word.WdCollapseDirection.wdCollapseEnd);
}
return result;
}
private Word.Range FindNextClose(Word.Range range, string text)
{
return this.CreateFind(range, text).Found ? range.Duplicate : null;
}
private Word.Find CreateFind(Word.Range range, string text)
{
Word.Find result = range.Find;
result.Execute(FindText: text, Forward: true, Wrap: Word.WdFindWrap.wdFindStop);
return result;
}
}
}

How to get a method/property description? [C#] [duplicate]

I'm looking for a way to programmatically get the summary portion of Xml-comments of a method in ASP.net.
I have looked at the previous related posts and they do not supply a way of doing so in a web environment.
I can not use any 3rd party apps and due to a web environment, Visual studio plugin's aren't much use either.
The closest thing I have found to a working solution was the JimBlackler project, but it only works on DLL's.
Naturally, something like 'supply .CS file, get XML documentation' would be optimal.
Current situation
I have a web-service and trying to dynamically generate documentation for it.
Reading the Methods, and properties is easy, but getting the Summary for each method is throwing me off a bit.
/// <summary>
/// This Is what I'm trying to read
/// </summary>
public class SomeClass()
{
/// <summary>
/// This Is what I'm trying to read
/// </summary>
public void SomeMethod()
{
}
}

A Workaround - Using reflection on Program.DLL/EXE together with Program.XML file
If you take a look at the sibling .XML file generated by Visual Studio you will see that there is a fairly flat hierarchy of /members/member.
All you have to do is get hold on each method from your DLL via MethodInfo object. Once you have this object you turn to the XML and use XPATH to get the member containing the XML documentation for this method.
Members are preceded by a letter. XML doc for methods are preceded by "M:" for class by "T:" etc.
Load your sibling XML
string docuPath = dllPath.Substring(0, dllPath.LastIndexOf(".")) + ".XML";
if (File.Exists(docuPath))
{
_docuDoc = new XmlDocument();
_docuDoc.Load(docuPath);
}
Use this xpath to get the member representing the method XML docu
string path = "M:" + mi.DeclaringType.FullName + "." + mi.Name;
XmlNode xmlDocuOfMethod = _docuDoc.SelectSingleNode(
"//member[starts-with(#name, '" + path + "')]");
Now scan childnodes for all the rows of "///"
Sometimes the /// Summary contains extra blanks, if this bothers use this to remove
var cleanStr = Regex.Replace(row.InnerXml, #"\s+", " ");

The XML summary isn't stored in the .NET assembly - it's optionally written out to an XML file as part of your build (assuming you're using Visual Studio).
Consequently there is no way to "pull out" the XML summaries of each method via reflection on a compiled .NET assembly (either .EXE or .DLL) - because the data simply isn't there for you to pull out. If you want the data, you'll have to instruct your build environment to output the XML files as part of your build process and parse those XML files at runtime to get at the summary information.

You could 'document' your method using the System.ComponentModel.DataAnnotations.DisplayAttribute attribute, e.g.
[Display(Name = "Foo", Description = "Blah")]
void Foo()
{
}
then use reflection to pull the description at runtime.

A deleted post, made by #OleksandrIeremenko, on this thread links to this article https://jimblackler.net/blog/?p=49 which was the basis for my solution.
Below is a modification of Jim Blackler's code making extension methods off the MemberInfo and Type objects and adding code that returns the summary text or an empty string if not available.
Usage
var typeSummary = typeof([Type Name]).GetSummary();
var methodSummary = typeof([Type Name]).GetMethod("[Method Name]").GetSummary();
Extension Class
/// <summary>
/// Utility class to provide documentation for various types where available with the assembly
/// </summary>
public static class DocumentationExtensions
{
/// <summary>
/// Provides the documentation comments for a specific method
/// </summary>
/// <param name="methodInfo">The MethodInfo (reflection data ) of the member to find documentation for</param>
/// <returns>The XML fragment describing the method</returns>
public static XmlElement GetDocumentation(this MethodInfo methodInfo)
{
// Calculate the parameter string as this is in the member name in the XML
var parametersString = "";
foreach (var parameterInfo in methodInfo.GetParameters())
{
if (parametersString.Length > 0)
{
parametersString += ",";
}
parametersString += parameterInfo.ParameterType.FullName;
}
//AL: 15.04.2008 ==> BUG-FIX remove “()” if parametersString is empty
if (parametersString.Length > 0)
return XmlFromName(methodInfo.DeclaringType, 'M', methodInfo.Name + "(" + parametersString + ")");
else
return XmlFromName(methodInfo.DeclaringType, 'M', methodInfo.Name);
}
/// <summary>
/// Provides the documentation comments for a specific member
/// </summary>
/// <param name="memberInfo">The MemberInfo (reflection data) or the member to find documentation for</param>
/// <returns>The XML fragment describing the member</returns>
public static XmlElement GetDocumentation(this MemberInfo memberInfo)
{
// First character [0] of member type is prefix character in the name in the XML
return XmlFromName(memberInfo.DeclaringType, memberInfo.MemberType.ToString()[0], memberInfo.Name);
}
/// <summary>
/// Returns the Xml documenation summary comment for this member
/// </summary>
/// <param name="memberInfo"></param>
/// <returns></returns>
public static string GetSummary(this MemberInfo memberInfo)
{
var element = memberInfo.GetDocumentation();
var summaryElm = element?.SelectSingleNode("summary");
if (summaryElm == null) return "";
return summaryElm.InnerText.Trim();
}
/// <summary>
/// Provides the documentation comments for a specific type
/// </summary>
/// <param name="type">Type to find the documentation for</param>
/// <returns>The XML fragment that describes the type</returns>
public static XmlElement GetDocumentation(this Type type)
{
// Prefix in type names is T
return XmlFromName(type, 'T', "");
}
/// <summary>
/// Gets the summary portion of a type's documenation or returns an empty string if not available
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static string GetSummary(this Type type)
{
var element = type.GetDocumentation();
var summaryElm = element?.SelectSingleNode("summary");
if (summaryElm == null) return "";
return summaryElm.InnerText.Trim();
}
/// <summary>
/// Obtains the XML Element that describes a reflection element by searching the
/// members for a member that has a name that describes the element.
/// </summary>
/// <param name="type">The type or parent type, used to fetch the assembly</param>
/// <param name="prefix">The prefix as seen in the name attribute in the documentation XML</param>
/// <param name="name">Where relevant, the full name qualifier for the element</param>
/// <returns>The member that has a name that describes the specified reflection element</returns>
private static XmlElement XmlFromName(this Type type, char prefix, string name)
{
string fullName;
if (string.IsNullOrEmpty(name))
fullName = prefix + ":" + type.FullName;
else
fullName = prefix + ":" + type.FullName + "." + name;
var xmlDocument = XmlFromAssembly(type.Assembly);
var matchedElement = xmlDocument["doc"]["members"].SelectSingleNode("member[#name='" + fullName + "']") as XmlElement;
return matchedElement;
}
/// <summary>
/// A cache used to remember Xml documentation for assemblies
/// </summary>
private static readonly Dictionary<Assembly, XmlDocument> Cache = new Dictionary<Assembly, XmlDocument>();
/// <summary>
/// A cache used to store failure exceptions for assembly lookups
/// </summary>
private static readonly Dictionary<Assembly, Exception> FailCache = new Dictionary<Assembly, Exception>();
/// <summary>
/// Obtains the documentation file for the specified assembly
/// </summary>
/// <param name="assembly">The assembly to find the XML document for</param>
/// <returns>The XML document</returns>
/// <remarks>This version uses a cache to preserve the assemblies, so that
/// the XML file is not loaded and parsed on every single lookup</remarks>
public static XmlDocument XmlFromAssembly(this Assembly assembly)
{
if (FailCache.ContainsKey(assembly))
{
throw FailCache[assembly];
}
try
{
if (!Cache.ContainsKey(assembly))
{
// load the docuemnt into the cache
Cache[assembly] = XmlFromAssemblyNonCached(assembly);
}
return Cache[assembly];
}
catch (Exception exception)
{
FailCache[assembly] = exception;
throw;
}
}
/// <summary>
/// Loads and parses the documentation file for the specified assembly
/// </summary>
/// <param name="assembly">The assembly to find the XML document for</param>
/// <returns>The XML document</returns>
private static XmlDocument XmlFromAssemblyNonCached(Assembly assembly)
{
var assemblyFilename = assembly.Location;
if (!string.IsNullOrEmpty(assemblyFilename))
{
StreamReader streamReader;
try
{
streamReader = new StreamReader(Path.ChangeExtension(assemblyFilename, ".xml"));
}
catch (FileNotFoundException exception)
{
throw new Exception("XML documentation not present (make sure it is turned on in project properties when building)", exception);
}
var xmlDocument = new XmlDocument();
xmlDocument.Load(streamReader);
return xmlDocument;
}
else
{
throw new Exception("Could not ascertain assembly filename", null);
}
}
}

You can use Namotion.Reflection NuGet package to get these information:
string summary = typeof(Foo).GetXmlDocsSummary();

You can look at https://github.com/NSwag/NSwag - source for nuget NSwag.CodeGeneration - it gets summary as well, usage
var generator = new WebApiAssemblyToSwaggerGenerator(settings);<br/>
var swaggerService = generator.GenerateForController("namespace.someController");<br/>
// string with comments <br/>
var swaggerJson = swaggerService.ToJson();
(try ILSPY decompiler against your dll, you check code and comments)

If you have access to the source code you're trying to get comments for, then you can use Roslyn compiler platform to do that. It basically gives you access to all the intermediary compiler metadata and you can do anything you want with it.
It's a bit more complicated than what other people are suggesting, but depending on what your needs are, might be an option.
It looks like this post has a code sample for something similar.

Moving a document library item from one folder to another including version history using c#

Using Sharepoint 2007 object model, I have been looking for an example in C# to move an item from one document library to another on the same server and saving the version history (i.e. SPListItemVersion objects) and metadata (the folders have the same content types, etc).

I was able to accomplish what I wanted to do with the following code:
/// <summary>
/// Adds item to archive
/// </summary>
/// <param name="item">Item to add</param>
/// <param name="destination">Archive path</param>
/// <param name="destination">web site of archive</param>
/// <returns>Result of arhivation process</returns>
public static string ArchiveItem(SPListItem item, string destination, SPWeb web)
{
// Save main meta information for later use:
var author = item.File.Author;
var modifiedBy = item.File.ModifiedBy;
var modified = item.File.TimeLastModified;
var created = item.File.TimeCreated;
// Get destination filename:
var destinationFile = destination + "/" + item.File.Name;
// Copy the item and set properties:
var coppiedFile = web.GetFolder(destination).Files.Add(
destinationFile,
item.File.OpenBinary(),
author,
modifiedBy,
created,
modified
);
coppiedFile.Item["Created"] = created;
coppiedFile.Item["Modified"] = modified;
// Save changes, UpdateOverwriteVersion causes object to save without saving a new version.
coppiedFile.Item.UpdateOverwriteVersion();
// If moving is enabled, delete original item:
item.Delete();
return coppiedFile.ServerRelativeUrl;
}