public void Add(string item, string pos)
{
var numStr = "";
foreach (var x in pos)
{
if ("QWERTYUIOPASDFGHJKLZXCVBNM".Contains(x))
{
numStr += x;
}
}
var num = new ColNumber(numStr);
var intvalue = Convert.ToInt64(ColNumber.FromNumberSystem26(num)) - 1;
while (this.LongCount() != intvalue + 1)
{
this.Add(null);
}
this[(int)intvalue] = item;
}
public void SaveChanges()
{
var tmp = this.Cast <List <string> >()
.ToList();
if (this is SheetHDR)
{
tmp.Insert(0, (this as SheetHDR).Header.ToList());
}
var row = 1ul;
ColNumber col;
// 获取sheetX.xml
var sheetX = excel.ZipArchive.GetEntry($"xl/worksheets/sheet{Id}.xml");
using (var stream = sheetX.Open())
using (var sr = new StreamReader(stream))
{
// 获取sheetData节点
var xd = new XmlDocument();
xd.LoadXml(sr.ReadToEnd());
var sheetData = xd.GetElementsByTagName("sheetData")
.Cast <XmlNode>()
.First();
// 删除全部元素
sheetData.RemoveAll();
foreach (var x in this)
{
col = new ColNumber("A");
// 添加row节点
var element = xd.CreateElement("row", xd.DocumentElement.NamespaceURI);
element.SetAttribute("r", row.ToString());
element.SetAttribute("spans", "1:1");
foreach (var y in x)
{
var innerText = "";
var flag = false;
try
{
if (y.Length > 11 && y[0] != '-' || y.Length > 12 && y[0] == '-')
{
throw new Exception();
}
// 如果是数值类型，则直接写入xml
if (x.Contains("."))
{
// 如果是小数尝试转换为double
innerText = Convert.ToDouble(y).ToString();
}
else
{
// 如果是整数尝试转换为long
innerText = Convert.ToInt64(y).ToString();
}
}
catch
{
// 否则需要将字符串添加到sharedStrings.xml中，并生成索引
if (!StringDictionary.Exist(y))
{
innerText = StringDictionary._Add(y).ToString();
}
else
{
innerText = StringDictionary._IndexOf(y).ToString();
}
flag = true;
}
var element2 = xd.CreateElement("c", xd.DocumentElement.NamespaceURI);
element2.SetAttribute("r", col + row.ToString());
if (flag)
{
element2.SetAttribute("t", "s");
}
var element3 = xd.CreateElement("v", xd.DocumentElement.NamespaceURI);
element3.InnerText = innerText;
element2.AppendChild(element3);
element.AppendChild(element2);
col++;
}
sheetData.AppendChild(element);
row++;
}
// 保存sheetX.xml
stream.Position = 0;
stream.SetLength(0);
xd.Save(stream);
}
// 回收垃圾
GC.Collect();
// 保存sharedStrings.xml
var sharedStrings = excel.ZipArchive.GetEntry($"xl/sharedStrings.xml");
using (var stream = sharedStrings.Open())
using (var sw = new StreamWriter(stream))
{
var xmlString = new StringBuilder($@"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes""?>
<sst count=""{StringDictionary.LongCount()}"" xmlns=""http://schemas.openxmlformats.org/spreadsheetml/2006/main"">");
var inner = new StringBuilder();
foreach (var x in StringDictionary)
{
xmlString.Append($" <si><t>{x}</t></si>\r\n");
}
xmlString.Append("</sst>");
sw.Write(xmlString);
}
// 回收垃圾
GC.Collect();
}