There are two ways to get the reference of XML web service in .NET Visual Studio project:

1. Add web reference to the project or
2. Create proxy class using WSDL.exe and include it in Visual Studio project

I am following step 2 here.

To make proxy class generic add a constructor in proxy class with a parameter as web url

public Lists(string contentHubUrl)
{
this.Url = string.Format(“{0}/_vti_bin/lists.asmx”, contentHubUrl);
}

Now in your code write a method that will consume this proxy class and fetch the relevant items form SharePoint list.

private DataTable GetLists(string url, string listName, string[] columnNames, string login, string password, string queryText, string filterFields)
{
DataTable dtOutput = new DataTable();
//List WebService
Lists ls = new Lists(url);
ls.PreAuthenticate = true;
ls.Credentials = new NetworkCredential(login, password);
ls.Url = url + @”/_vti_bin/lists.asmx”;
            XmlNode node = ls.GetListCollection();
            foreach (XmlNode list in node.ChildNodes)
{
string title = list.Attributes[“Title”].Value;
                if (title.Equals(listName))
{
XmlDocument xmlDoc = new System.Xml.XmlDocument();
                    XmlNode ndQuery = xmlDoc.CreateNode(XmlNodeType.Element, “Query”, “”);
XmlNode ndViewFields =
xmlDoc.CreateNode(XmlNodeType.Element, “ViewFields”, “”);
XmlNode ndQueryOptions =
xmlDoc.CreateNode(XmlNodeType.Element, “QueryOptions”, “”);
                    ndQueryOptions.InnerXml = string.Empty;
ndViewFields.InnerXml = filterFields;
ndQuery.InnerXml = queryText;
                    //Getting Items
                    XmlNode itemsNode = ls.GetListItems(title, string.Empty, ndQuery, ndViewFields, null, ndQueryOptions, list.Attributes[“WebId”].Value);
                    using (XmlTextReader reader = new XmlTextReader(itemsNode.OuterXml, XmlNodeType.Element, null))
{
DataSet dataSet = new DataSet();
dataSet.ReadXml(reader);
                        dtOutput.Columns.Add(“Title”, typeof(string));
                        foreach (var columnName in columnNames)
{
dtOutput.Columns.Add(columnName, typeof(string));
}

                        if (dataSet.Tables[“row”] != null)
{
foreach (DataRow row in dataSet.Tables[“row”].Rows)
{
DataRow dr = dtOutput.NewRow();
dr[“Title”] = (row[“ows_Title”] != null && !string.IsNullOrEmpty(row[“ows_Title”].ToString())) ? row[“ows_Title”].ToString() : string.Empty;
                                foreach (var columnName in columnNames)
{
string replacedColumnName = columnName.Replace(“_x0020_”, ” “);
                                    dr[columnName] = (row[“ows_” + replacedColumnName] != null &&
!string.IsNullOrEmpty(row[“ows_” + replacedColumnName].ToString()))
? row[“ows_” + replacedColumnName].ToString()
: string.Empty;
}
dtOutput.Rows.Add(dr);
}
}
dataSet.Dispose();
}
break;
}
}
            ls.Abort();
return dtOutput;
}

Call above method as below:

  string[] showFields = new string[2];
showFields[0] = “ID”;
showFields[1] = “EventDate”;
DataTable eventsTable = this.GetLists(WebURL, ListName, showFields, “userName”,  “password”, [CAML QUERY] as string, “”);

Above code is to fetch the items from List. Now below is the code to update list item

private bool UpdateListItem(string url, string listName, string columnName, string titleText, string newColumnValue, string login, string password)
{
bool isUpdated = false;
//List WebService
Lists ls = new Lists();
ls.PreAuthenticate = true;
ls.Credentials = new NetworkCredential(login, password);
ls.Url = url + @”/_vti_bin/lists.asmx”;

            XmlNode node = ls.GetListCollection();
            foreach (XmlNode list in node.ChildNodes)
{
////Check whether list is document library
//if (Convert.ToInt32(list.Attributes[“ServerTemplate”].Value) != 0x65)
//{
//    continue;
//}
                string title = list.Attributes[“Title”].Value;
                if (title.Equals(listName))
{
                    XmlDocument xmlDoc = new System.Xml.XmlDocument();
                    XmlNode ndQuery = xmlDoc.CreateNode(XmlNodeType.Element, “Query”, “”);
XmlNode ndViewFields =
xmlDoc.CreateNode(XmlNodeType.Element, “ViewFields”, “”);
XmlNode ndQueryOptions =
xmlDoc.CreateNode(XmlNodeType.Element, “QueryOptions”, “”);
                    ndQueryOptions.InnerXml = string.Empty;
ndViewFields.InnerXml = “” + newColumnValue + “”;
                                XmlDocument xmlDocToUpdate = new System.Xml.XmlDocument();
                                System.Xml.XmlElement elBatch = xmlDocToUpdate.CreateElement(“Batch”);
                                elBatch.SetAttribute(“OnError”, “Continue”);
elBatch.SetAttribute(“ListVersion”, “1”);
elBatch.SetAttribute(“ViewName”,
string.Empty);
elBatch.InnerXml = strBatch;
XmlNode ndReturn = ls.UpdateListItems(title, elBatch);
isUpdated = true;
}
}
                        dataSet.Dispose();
}
break;
}
}
ls.Abort();
return isUpdated;
}

Call above method using

isDone = this.UpdateListItem(destinationListWebUrl, destinationListName, destinationListColumnName, dr[“Title”].ToString().Replace(“&”, “&”), finalColumnValue, userID, pwd);

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Satyendra

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