The List class contains an internal array and exposes methods and properties that, among other things, allow read and write access to the elements of the internal array.
The List: a Homogeneous, Self-Redimensioning Array
Conclusion…
The List class has same performance of array.
but needs multiple memories.
System.Diagnostics.Debug.WriteLine(“MESSAGE”);
ConfigurationManager.AppSettings[someKey] -> return someValue
<configuration>
<appSettings>
<add key=”someKey” value=”someValue”/>
</appSettings>
</configuration>
HttpContext.Current.Request.UrlReferrer.Query.Substring(1);
ex)
http://000.000.000.000:0000/index.html?A=B&C=D
-> A=B&C=D
new TransactionScope(TransactionScopeOption.Required, TimeSpan.FromMinutes([minutes]));
SqlCommand.CommandTimeout = [second]
colIndexToAlpha(27) -> return AA
alphaToColIndex(AA) -> return 27
// get cellReference’s column from column index
public string colIndexToAlpha(int colIndex) {
List<string> colNameList = new List<string>();
int num1 = Convert.ToInt32(colIndex) – 1;
int num2 = 0;
int num3 = 0;
while (true) {
num2 = num1 / 26;
num3 = num1 – 26 * num2;
colNameList.Insert(0, numToAlpha(num3));
if (num2 < 26) {
colNameList.Insert(0, numToAlpha(num2 – 1));
break;
}
num1 = num2;
}
return String.Join(“”, colNameList.ToArray());
}
private String numToAlpha(int number) {
if (number < 0) {
return “”;
}
Char c = (Char)(65 + number);
return c.ToString();
}
// get column index from cellReference’s column
public int alphaToColIndex(string name) {
int index = 0;
for (int i = 0; i < name.Length; i++) {
index *= 26;
index += alphaToNum(name[i]);
}
return index;
}
private int alphaToNum(char alpha) {
return alpha – 64;// A -> 1 Z -> 26
}
private int alphaToNum(string alpha) {
if (alpha.Length != 1) {
return 0;
}
return alpha[0] – 64; // A -> 1 Z -> 26
}
private Regex regexRow = new Regex(@”d+”);
public int getRowIndex(string cellReferance) {
return int.Parse(regexRow.Match(cellName).Value);
}
private Regex regexCol = new Regex(“[A-Za-z]+”);
private string getColumnName(string cellReferance) {
return regexCol.Match(cellName).Value;
}
get all files and directories in C# and set all files and directories in JS
C#
GetFilesAndDirectories(@”C:”, true);
private List<object> GetFilesAndDirectories(string path, bool isRoot = false) {
List<object> fileList = new List<object>();
Dictionary<string, object> fileItem = new Dictionary<string, object>();
if (isRoot) {
fileItem = new Dictionary<string, object>();
fileItem[“type”] = “dir”;
fileItem[“value”] = path.Substring(path.LastIndexOf(Path.DirectorySeparatorChar) + 1);
fileItem[“path”] = path;
fileItem[“fileList”] = GetFilesAndDirectories(path);
fileList.Add(fileItem);
} else {
foreach (string dir in Directory.GetDirectories(path)) {
fileItem = new Dictionary<string, object>();
fileItem[“type”] = “dir”;
fileItem[“value”] = dir.Substring(dir.LastIndexOf(Path.DirectorySeparatorChar) + 1);
fileItem[“path”] = dir;
fileItem[“fileList”] = GetFilesAndDirectories(dir);
fileList.Add(fileItem);
}
foreach (string file in Directory.GetFiles(path)) {
fileItem = new Dictionary<string, object>();
fileItem[“type”] = “file”;
fileItem[“value”] = Path.GetFileName(file);
fileItem[“path”] = file;
fileItem[“exe”] = Path.GetExtension(file);
fileList.Add(fileItem);
}
}
return fileList;
}
JS
getFileInfo (c#returnedFileList, true);
var getFileInfo = function (fileList, isRoot) {
var rtnHtml = “”;
if ($.isArray(fileList)) {
rtnHtml += isRoot || false ? ‘<ul>’ : ‘<ul style=”display:none;”>’;
for (var i = 0, iLen = fileList.length; i < iLen; i++) {
var fileItem = fileList[i];
if (fileItem[“type”] === “dir”) {
rtnHtml += ‘<li><div class=”directory”>’ + fileItem[“value”] + ‘</div>’;
if (fileItem[“fileList”].length !== 0) {
rtnHtml += getFileInfo(fileItem[“fileList”]);
}
} else if (fileItem[“type”] === “file”) {
rtnHtml += ‘<li><div class=”file”>’ + fileItem[“value”] + ‘</div></li>’;
}
}
rtnHtml += ‘</ul>’;
}
return rtnHtml;
};
string filename = “test.xls”;
string filePath = “c:\text.xls”;
FileStream sourceFile = new FileStream(filePath, FileMode.Open);
float FileSize;
FileSize = sourceFile.Length;
byte[] getContent = new byte[(int)FileSize];
sourceFile.Read(getContent, 0, (int)sourceFile.Length);
sourceFile.Close();
HttpContext.Current.Response.Buffer = true;
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.ClearContent();
// 日本語ファイル名対応（japanese filename support）
HttpContext.Current.Response.HeaderEncoding = System.Text.Encoding.GetEncoding(“shift_jis”);
HttpContext.Current.Response.AddHeader(“Content-Disposition”, “attachment; filename=” + filename);
HttpContext.Current.Response.ContentType = “application/octet-stream”;
HttpContext.Current.Response.BinaryWrite(getContent);
HttpContext.Current.Response.End();
// IEでは.NET利用し、システム（ＯＳ）言語によりエンコードを勝手に判断するらしい。