code pour écrire dans un fichier excel

Je cherche à réaliser un alerte qui a besoin de lire et écrire des informations dans un fichier excel stocké dans une liste.

Savez vous comment réaliser cette lecture et écriture dans une case définie?

Si tu cherches un peu sur le net, tu trouveras tout un tas de snippets qui feront ton bonheur.
Voici par exemple 2 methodes, l'une pour écrire une chaine de caractères, et l'autre pour écrire une valeur entière.
Sur codeplex, il y'a également un projet qui facilite la lecture/écriture dans les fichiers Excel 2007.
Bref, en cherchan un peu, tu devrais tout trouver.

Code:

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private bool XLInsertNumberIntoCell(string fileName, string sheetName, string addressName, string value) { const string documentRelationshipType = "http://schemas.openxmlformats.org/officeDocument/2006/" + "relationships/officeDocument"; const string worksheetSchema = "http://schemas.openxmlformats.org/spreadsheetml/2006/main";   PackagePart documentPart = null; Uri documentUri = null; bool returnValue = false;   using (Package xlPackage = Package.Open(fileName, FileMode.Open, FileAccess.ReadWrite)) { foreach (System.IO.Packaging.PackageRelationship relationship in xlPackage.GetRelationshipsByType(documentRelationshipType)) { documentUri = PackUriHelper.ResolvePartUri(new Uri("/", UriKind.Relative), relationship.TargetUri); documentPart = xlPackage.GetPart(documentUri);   break; }   if (documentPart != null) { XmlDocument doc = new XmlDocument(); doc.Load(documentPart.GetStream());   XmlNamespaceManager nsManager = new XmlNamespaceManager(doc.NameTable); nsManager.AddNamespace("d", doc.DocumentElement.NamespaceURI);   string searchString = string.Format("//d:sheet[@name='{0}']", sheetName); XmlNode sheetNode = doc.SelectSingleNode(searchString, nsManager); if (sheetNode != null) { XmlAttribute relationAttribute = sheetNode.Attributes["r:id"]; if (relationAttribute != null) { string relId = relationAttribute.Value;   PackageRelationship sheetRelation = documentPart.GetRelationship(relId); Uri sheetUri = PackUriHelper.ResolvePartUri(documentUri, sheetRelation.TargetUri); PackagePart sheetPart = xlPackage.GetPart(sheetUri);   XmlDocument xDoc = new XmlDocument(); xDoc.Load(sheetPart.GetStream());   System.Text.RegularExpressions.Regex r = new System.Text.RegularExpressions.Regex(@"^(?<col>\D+)(?<row>\d+)"); string rowNumber = r.Match(addressName).Result("${row}");   XmlNode cellnode = xDoc.SelectSingleNode( string.Format("//d:sheetData/d:row/d:c[@r='{0}']", addressName), nsManager); if (cellnode == null) { XmlElement cellElement = xDoc.CreateElement("c", worksheetSchema); cellElement.Attributes.Append(xDoc.CreateAttribute("r")); cellElement.Attributes["r"].Value = addressName;   XmlElement valueElement = xDoc.CreateElement("v", worksheetSchema); valueElement.InnerText = value.ToString(); cellElement.AppendChild(valueElement);   cellElement.Attributes.Append(xDoc.CreateAttribute("s")); cellElement.Attributes["s"].Value = "0";   XmlNode rowNode = xDoc.SelectSingleNode(string.Format( "//d:sheetData/d:row[@r='{0}']", rowNumber), nsManager); if (rowNode == null) { XmlNode sheetDataNode = xDoc.SelectSingleNode("//d:sheetData", nsManager); if (sheetDataNode != null) { XmlElement rowElement = xDoc.CreateElement("row", worksheetSchema); rowElement.Attributes.Append(xDoc.CreateAttribute("r")); rowElement.Attributes["r"].Value = rowNumber; rowElement.AppendChild(cellElement); sheetDataNode.AppendChild(rowElement); returnValue = true; } } else { XmlAttribute styleAttr = ((XmlAttribute)(rowNode.Attributes.GetNamedItem("s"))); if (styleAttr != null) { cellElement.Attributes["s"].Value = styleAttr.Value; }   XmlNode biggerNode = null; XmlNodeList cellNodes = rowNode.SelectNodes("./d:c", nsManager); if (cellNodes != null) { foreach (XmlNode node in cellNodes) { if (String.Compare(node.Attributes["r"].Value, addressName) > 0) { biggerNode = node; break; } } } if (biggerNode == null) { rowNode.AppendChild(cellElement); } else { rowNode.InsertBefore(cellElement, biggerNode); } returnValue = true; } } else { cellnode.Attributes.RemoveNamedItem("t"); XmlNode valueNode = cellnode.SelectSingleNode("d:v", nsManager); if (valueNode == null) { valueNode = xDoc.CreateElement("v", worksheetSchema); cellnode.AppendChild(valueNode); } valueNode.InnerText = value.ToString(); returnValue = true; } xDoc.Save(sheetPart.GetStream(FileMode.Create, FileAccess.Write)); } } } } return returnValue; }   private bool XLInsertStringIntoCell(string fileName, string sheetName, string addressName, string value) { const string documentRelationshipType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument"; const string worksheetSchema = "http://schemas.openxmlformats.org/spreadsheetml/2006/main"; const string sharedStringsRelationshipType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings"; const string sharedStringSchema = "http://schemas.openxmlformats.org/spreadsheetml/2006/main";   PackagePart documentPart = null; Uri documentUri = null; bool returnValue = false;   using (Package xlPackage = Package.Open(fileName, FileMode.Open, FileAccess.ReadWrite)) { foreach (System.IO.Packaging.PackageRelationship relationship in xlPackage.GetRelationshipsByType(documentRelationshipType)) { documentUri = PackUriHelper.ResolvePartUri(new Uri("/", UriKind.Relative), relationship.TargetUri); documentPart = xlPackage.GetPart(documentUri); break; }   if (documentPart != null) { XmlDocument doc = new XmlDocument(); doc.Load(documentPart.GetStream());   NameTable nt = new NameTable(); XmlNamespaceManager nsManager = new XmlNamespaceManager(nt); nsManager.AddNamespace("d", worksheetSchema); nsManager.AddNamespace("s", sharedStringSchema);   string searchString = string.Format("//d:sheet[@name='{0}']", sheetName); XmlNode sheetNode = doc.SelectSingleNode(searchString, nsManager); if (sheetNode != null) { XmlAttribute relationAttribute = sheetNode.Attributes["r:id"]; if (relationAttribute != null) { string relId = relationAttribute.Value;   PackageRelationship sheetRelation = documentPart.GetRelationship(relId); Uri sheetUri = PackUriHelper.ResolvePartUri(documentUri, sheetRelation.TargetUri); PackagePart sheetPart = xlPackage.GetPart(sheetUri);   XmlDocument xDoc = new XmlDocument(nt); xDoc.Load(sheetPart.GetStream());   foreach (System.IO.Packaging.PackageRelationship stringRelationship in documentPart.GetRelationshipsByType(sharedStringsRelationshipType)) { Uri sharedStringsUri = PackUriHelper.ResolvePartUri(documentUri, stringRelationship.TargetUri); PackagePart stringPart = xlPackage.GetPart(sharedStringsUri); if (stringPart != null) { XmlDocument stringDoc = new XmlDocument(nt); stringDoc.Load(stringPart.GetStream());   int index = -1;   XmlNode stringNode = stringDoc.SelectSingleNode(string.Format("//s:si[s:t='{0}']", value), nsManager); if (stringNode == null) { // You didn't find the string in the table, so add it now. stringNode = stringDoc.CreateElement("si", sharedStringSchema); XmlElement textNode = stringDoc.CreateElement("t", sharedStringSchema); textNode.InnerText = value; stringNode.AppendChild(textNode); stringDoc.DocumentElement.AppendChild(stringNode); }   if (stringNode != null) { XmlNodeList nodes = stringNode.SelectNodes("preceding-sibling::d:si", nsManager); index = nodes.Count;   System.Text.RegularExpressions.Regex r = new System.Text.RegularExpressions.Regex(@"^(?<col>\D+)(?<row>\d+)"); string rowNumber = r.Match(addressName).Result("${row}");   XmlNode cellNode = xDoc.SelectSingleNode(string.Format("//d:sheetData/d:row/d:c[@r='{0}']", addressName), nsManager); if (cellNode == null) { XmlElement cellElement = xDoc.CreateElement("c", worksheetSchema); cellElement.Attributes.Append(xDoc.CreateAttribute("r")); cellElement.Attributes["r"].Value = addressName;   cellElement.Attributes.Append(xDoc.CreateAttribute("t")); cellElement.Attributes["t"].Value = "s";   cellElement.Attributes.Append(xDoc.CreateAttribute("s")); cellElement.Attributes["s"].Value = "0";   XmlElement valueElement = xDoc.CreateElement("v", worksheetSchema); valueElement.InnerText = index.ToString(); cellElement.AppendChild(valueElement);   XmlNode rowNode = xDoc.SelectSingleNode(string.Format("//d:sheetData/d:row[@r='{0}']", rowNumber), nsManager); if (rowNode == null) { XmlNode sheetDataNode = xDoc.SelectSingleNode("//d:sheetData", nsManager); if (sheetDataNode != null) { XmlElement rowElement = xDoc.CreateElement("row", worksheetSchema); rowElement.Attributes.Append(xDoc.CreateAttribute("r")); rowElement.Attributes["r"].Value = rowNumber; rowElement.AppendChild(cellElement); sheetDataNode.AppendChild(rowElement); returnValue = true; } } else { XmlAttribute styleAttr = ((XmlAttribute)(rowNode.Attributes.GetNamedItem("s"))); if (styleAttr != null) { cellElement.Attributes["s"].Value = styleAttr.Value; } XmlNode biggerNode = null; XmlNodeList cellNodes = rowNode.SelectNodes("./d:c", nsManager); if (cellNodes != null) { foreach (XmlNode node in cellNodes) { if (String.Compare(node.Attributes["r"].Value, addressName) > 0) { biggerNode = node; break; } } } if (biggerNode == null) { rowNode.AppendChild(cellElement); } else { rowNode.InsertBefore(cellElement, biggerNode); } returnValue = true; } } else { if (cellNode.Attributes["t"] == null) { cellNode.Attributes.Append(xDoc.CreateAttribute("t")); } cellNode.Attributes["t"].Value = "s"; XmlNode valueNode = cellNode.SelectSingleNode("d:v", nsManager); if (valueNode == null) { valueNode = xDoc.CreateElement("v", worksheetSchema); cellNode.AppendChild(valueNode); } valueNode.InnerText = index.ToString(); returnValue = true; }   stringDoc.Save(stringPart.GetStream(FileMode.Create, FileAccess.Write));   xDoc.Save(sheetPart.GetStream(FileMode.Create, FileAccess.Write)); } } break; } } } } } return returnValue; }

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A ouai les fonctions sont quand même balaises...

Je pensais que c'était beaucoup plus simple que cela.

J'avais trouvé ce tutoriel:
http://stephaneey.developpez.com/tut...ervices/#LIV-A

Mais comme un boulet, je n'arrivais pas à utiliser la classe ExcelService à cause de l'oubli d'ajout de la référence web.