C#编码规范

1、连接数据库并返回DataTable

View Code

public DataTable GetDataByTable()
        {
            DataSet dataset = new DataSet();
            DataTable datatable = null;
 SqlConnection sqlConnection = new SqlConnection("Data Source=.;Initial Catalog=Calamity_Data;Integrated Security=True");
try
 {
 SqlDataAdapter sqlDataAdapter = new SqlDataAdapter("select top 50 * from calamity", sqlConnection);
 sqlDataAdapter.Fill(dataset, "calamity");
if (dataset != null && dataset.Tables.Count > 0)
 {
 datatable = dataset.Tables[0];
 }
 }
catch (Exception e)
 {
 }
finally
 {
 sqlConnection.Close();
 }
 Console.WriteLine("Calling WCF Service,Transfer data using DataTable");
return datatable;
 }

2、连接数据库文件的相对路径

SqlConnection sqlConnection = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\Database\\DatabaseWCF.mdf;Integrated Security=True;User Instance=True");

3、数组

交叉数组

for实现

int[][] arri = newint[3][];
 arri[0] = new int[] { 1, 2 };
 arri[1] = new int[] { 3 };
 arri[2] = new int[] { 4, 5, 6 };
int rlen=arri.Length;
for (int i=0; i < rlen; i++)
 {
int clen = arri[i].Length;
for (int j = 0; j < clen; j++)
 {
 Console.WriteLine(arri[i][j]);
 }
 }
 Console.Read();

foreach实现

foreach (int[] i in arri)
 {
foreach (int j in i)
 {
 Console.WriteLine(j);
 }

 }
 Console.Read();

二维数组

View Code

int[,] arri = newint[,] { { 1, 2, 3, 4 }, { 5, 6, 7, 8 } };
int rlen = arri.GetLength(0);//行数
 int clen = arri.GetLength(1);//列数

for (int i = 0; i < rlen; i++)
 {
for (int j = 0; j < clen; j++)
 {
 Console.WriteLine("第{0}行{1}列，值为{2}", i, j, arri[i, j]);
 }
 }
 Console.Read();