C# 仓库物料管理系统 连接数据库SQL 高级语言编程
(1)系统功能包括 ：产品入出库登记、确认入出库信息、删除库内信息、领出信息登记、产品分类管理、仓库设置。
(2)用户功能包括：查询库内信息、查询出库信息、查询入库信息、支持多格式查询信息导出、支持多格式信息批量导入、修改本用户密码。
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数据分析
数据库部分设计:参考 https://blog.csdn.net/qq_40953393/article/details/101375142
e-r图
部分代码:
饼状统计图绘制
//绘制饼状图************************
///
/// 计算数值综合
///
///
///
/// 计算各项比例
///
///
///
/// 根据比例，计算各项角度值
///
///
///
/// 绘制饼图(主要是分析不同类型的数值所占比例)，参数有图的标题，项目名称，项目的数值，名称和数值都是长度对应的
///
/// 图的标题
/// 项目名称
/// 项目的数值
/// Bitmap图形
public static Bitmap GetPieImage(string Title, string[] ItemName, decimal[] ItemValue)
{
Bitmap image = GenerateImage(Title);
//
//主区域图形
Rectangle RMain = new Rectangle(40, 80, 380, 300);
//图例信息
Rectangle RDes = new Rectangle(550, 90, 10, 10);
Font f = new Font("新宋体", 9, FontStyle.Bold);
Graphics g = Graphics.FromImage(image);
g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
try
{
//分析数据，绘制饼图和图例说明
decimal[] ItemRate = GetItemRate(ItemValue);
int[] ItemAngle = GetItemAngle(ItemRate);
int Angle1 = 0;
int Angle2 = 0;
int len = ItemValue.Length;
Color c = new Color();
//3D
g.DrawPie(new Pen(Color.Black), RMain, 0F, 360F);
g.DrawPie(new Pen(Color.Black), new Rectangle(RMain.X, RMain.Y + 10, RMain.Width, RMain.Height), 0F, 360F);
g.FillPie(new SolidBrush(Color.Black), new Rectangle(RMain.X, RMain.Y + 10, RMain.Width, RMain.Height), 0F, 360F);
//绘制
for (int i = 0; i < len; i++)
{
Angle2 = ItemAngle[i];
//if (c != GetRandomColor(i))
c = GetRandomColor(i);
SolidBrush brush = new SolidBrush(c);
string DesStr = ItemName[i] + "(" + (ItemRate[i] * 100).ToString(".00") + "%" + ")" + ItemValue[i].ToString(".00");
//
DrawPie(image, RMain, c, Angle1, Angle2);
Angle1 += Angle2;
DrawDes(image, RDes, c, DesStr, f, i);
}
return image;
}
finally
{
g.Dispose();
}
}效果如上面的图!!!
数据保存及其转换:
datatable转txt datatable数据转为excel txt或excel转DataSet
//datatable数据保存到txt
public void SavaTxt(DataTable dt, string name)
{
StreamWriter sw = new StreamWriter(name);
string col_txt = "";
string row_txt = "";
foreach (DataColumn item in dt.Columns)// dt为DataTable
{
col_txt += item.ToString() + " "; // 循环得到列名
}
col_txt = col_txt.Substring(0, col_txt.Length - 1);
sw.WriteLine(col_txt); //写入文件
foreach (DataRow item in dt.Rows)
{
row_txt = ""; //此处容易遗漏，导致数据的重复添加
for (int i = 0; i < dt.Columns.Count; i++)
{
row_txt += item[i].ToString() + " "; //循环得到行数据
}
row_txt = row_txt.Substring(0, row_txt.Length - 1);
sw.WriteLine(row_txt, Encoding.UTF8);//写入文件
}
sw.Close();
}
//datatable数据转为excel
public void SavaXls(Workbook workbook, string FileName = "")
{
if (!string.IsNullOrEmpty(FileName))
{
workbook.SaveToFile(FileName, ExcelVersion.Version2010);
}
else
{
workbook.SaveToFile(DateTime.Now.ToString("yyyyMMddhhmmssfff"), ExcelVersion.Version2010);
}
}
//读取txt文本内容
public string ReadTxtFile(string Path)
{
StreamReader sr = new StreamReader(Path);
string str = "";
while (!sr.EndOfStream)
{
str = sr.ReadLine().ToString();//读取每行数据
}
sr.Close();
return str;
}
//获取text文件或excel数据 转为DataSet 类型
public DataSet getData()
{
//判断文件后缀
var path = file.FileName;
string fileSuffix = System.IO.Path.GetExtension(path);
if (string.IsNullOrEmpty(fileSuffix))
return null;
else if (fileSuffix == ".txt")//txt数据转为datatable
{
DataSet ds = new DataSet();
// 读出文本文件的所有行
string[] lines = File.ReadAllLines(path, Encoding.Default);
DataTable dt = new DataTable();
Regex.Split(lines[0], @"\s+").Where(t => t.Trim() != "").ToList().ForEach(t => dt.Columns.Add(t.Trim()));
for (int i = 1; i < lines.Length; i++)
{
DataRow dr = dt.NewRow();
Regex.Split(lines[i], @"\s+").Where(t => t.Trim() != "").Select((t, index) => dr[index] = t).ToArray();
dt.Rows.Add(dr);
}
ds.Tables.Add(dt);
return ds;
}
else//excel数据转为datatable
{
using (DataSet ds = new DataSet())
{
//判断Excel文件是2003版本还是2007版本
string connString = "";
if (fileSuffix == ".xls")
connString = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + path + ";" + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\"";
else
connString = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + path + ";" + ";Extended Properties=\"Excel 12.0;HDR=YES;IMEX=1\"";
//读取excel文件
string sql_select = " SELECT * FROM [Sheet1$]";
using (OleDbConnection conn = new OleDbConnection(connString))
using (OleDbDataAdapter cmd = new OleDbDataAdapter(sql_select, conn))
{
conn.Open();
cmd.Fill(ds);
}
if (ds == null || ds.Tables.Count <= 0) return null;
return ds;
}
}
}数据库相关操作:增删查改
//数据库查询方法
public DataSet select(string select)
{
try
{
SqlConnection sqlconn = new SqlConnection(SQLstr);
SqlDataAdapter sqlda = new SqlDataAdapter(select, sqlconn);
DataSet dset = new DataSet();
sqlda.Fill(dset);
return dset;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "警告");
return null;
}
}
//数据库语句查询返回查询结果 ，字符串形式输出
//selectSQL 查询语句 name列名
public string select(string selectSQL,string name)
{
try
{
string s;
SqlConnection sqlconn = new SqlConnection(SQLstr);
SqlDataAdapter sqlda = new SqlDataAdapter(selectSQL, sqlconn);
DataSet dset = new DataSet();
sqlconn.Open();
sqlda.Fill(dset);
s = dset.Tables[0].Rows[0][name].ToString().Trim();
sqlconn.Close();
return s;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "警告");
return null;
}
}
//数据库语句操作方法
public void tranSQL(string str)
{
try
{
SqlConnection sqlconn = new SqlConnection(SQLstr);
SqlCommand sqlcomm = new SqlCommand(str, sqlconn);
sqlconn.Open();
sqlcomm.ExecuteNonQuery();
sqlconn.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "警告");
}
}
//读取数据库数据
public SqlDataReader readSQL(string str)
{
try
{
SqlConnection sqlconn = new SqlConnection(SQLstr);
SqlCommand sqlcomm = new SqlCommand(str, sqlconn);
sqlconn.Open();
SqlDataReader sdr = sqlcomm.ExecuteReader();
return sdr;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "警告");
return null;
}
}
//判断数据库重复真重复 假不存在
public bool judgeCopy(string sdrSQL,string strSQL,string strCON)
{
bool Flag = false;
SqlDataReader reader =readSQL(sdrSQL);
while (reader.Read())
{
if (strCON == reader[strSQL].ToString().Trim())
{
Flag = true;
break;
}
else
{
Flag = false;
}
}
reader.Close();
return Flag;
}
//数据库某一列数据存入字符数组
//sqlStr 数据库语句 rowStr列名
public string[] imgeNeedstring(string sqlStr,string rowStr)
{
DataTable dt = select(sqlStr).Tables[0];
//string dt = select(sqlStr,rowStr);
string[] abc = new string[dt.Rows.Count];
for (int i = 0; i < dt.Rows.Count; i++)
{
string row = select(sqlStr).Tables[0].Rows[i][rowStr].ToString().Trim();
abc[i] = row.ToString().Trim();
}
return abc;
}
//字符数组转decimal类型
public Decimal[] imgeDecimal(string sqlStr, string rowStr)
{
string[] Content = imgeNeedstring(sqlStr,rowStr);
Decimal[] d = new Decimal[Content.Length];
for (int i = 0; i < Content.Length; i++)
{
d[i] = Convert.ToInt32(Content[i].ToString().Trim());
}
return d;
}
///
///附加数据库
///
public void AttachDB()
{
SqlConnection conn = new SqlConnection("server = localhost; database = master; integrated security = SSPI");
SqlCommand comm = new SqlCommand();
conn.Open();
comm.Connection = conn;
comm.CommandText = "select count(*) from sys.databases where name = 'WNA'";
int a = Convert.ToInt32(comm.ExecuteScalar());
if (a == 1)
{
return;
}
else
{
try
{
string Path = @"../../obj/Debug/DataBase/";
FileInfo file = new FileInfo(Path);
string mdfPath = file.FullName + "WNMData.mdf";//mdf文件的路径
string ldfPath = file.FullName + "WNMData.ldf";
comm.CommandText = "sp_attach_db";//系统数据库master 中的一个附加数据库存储过程。
comm.Parameters.Add(new SqlParameter(@"dbname", SqlDbType.NVarChar));
comm.Parameters[@"dbname"].Value = "WNM";
comm.Parameters.Add(new SqlParameter(@"filename1", SqlDbType.NVarChar)); //一个主文件mdf，一个或者多个日志文件ldf，或次要文件ndf
comm.Parameters[@"filename1"].Value = mdfPath;
comm.Parameters.Add(new SqlParameter(@"filename2", SqlDbType.NVarChar));
comm.Parameters[@"filename2"].Value = ldfPath;
comm.CommandType = CommandType.StoredProcedure;
comm.ExecuteNonQuery();
//MessageBox.Show("附加数据库成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch //(Exception ex)
{
// MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
conn.Close();
}
}
}