C#以二制的方式同时存储文字和图片到sqlserver，并读取

前一段时间，公司有这个需求，然后呢，我就找了找相关的一些资料。

结果没有找到，然后有一次和女友一起出去散步，突然想到了这种方法。然后回来试了下，的确可以实现。

但是呢，很很多地方都需要改进，我这里只是拿出一个粗糙的实现而已。还请网友们多多指教。

不说废话了，贴代码吧。

前台代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>无标题页</title> </head> <body> <form id="form1" runat="server"> <div> 请输入你所想保存的文字：<asp:TextBox ID="TextBox1" runat="server" Width="216px"></asp:TextBox><br /> 请选择需要保存的文件： <asp:FileUpload ID="FileUpload1" runat="server" /><br /> 请选择要输出的格式： <asp:DropDownList ID="DropDownList1" runat="server" Width="222px"> <asp:ListItem>text/html</asp:ListItem> <asp:ListItem>text/plain</asp:ListItem> <asp:ListItem>image/gif</asp:ListItem> <asp:ListItem>image/jpeg</asp:ListItem> <asp:ListItem>image/tiff</asp:ListItem> <asp:ListItem>application/msword</asp:ListItem> <asp:ListItem>application/tiff</asp:ListItem> <asp:ListItem>application/x-excel</asp:ListItem> <asp:ListItem>application/ms-powerpoint</asp:ListItem> <asp:ListItem>application/pdf</asp:ListItem> <asp:ListItem>application/zip</asp:ListItem> </asp:DropDownList> <br /> <asp:Button ID="btnSave" runat="server" Text="保存" OnClick="btnSave_Click" /> <asp:Button ID="btnRead" runat="server" Text="读取" OnClick="btnRead_Click" /> <br /> <asp:Image ID="Image1" ImageUrl="~/Temp/aa.gif" runat="server" /></div> </form> </body> </html>

后台代码：

using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; using System.Web.Configuration; using System.IO; using System.Drawing; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void btnSave_Click(object sender, EventArgs e) { if (this.TextBox1.Text.Trim() == string.Empty) { Response.Write("<mce:script type="text/javascript"></mce:script>"); return; } if (this.FileUpload1.FileContent.Length == 0) { Response.Write("请选择需要导入的文件"); return; } byte[] contents1 = ConvertToByte(this.TextBox1.Text.Trim()); //定义变量获取一个文件 byte[] contents2 = this.FileUpload1.FileBytes; int len = contents1.Length + contents2.Length; byte[] contents = new byte[len]; int k = 0; for (int i = 0; i < len; i++) { if (i < contents1.Length) { contents[i] = contents1[i]; } else { contents[i] = contents2[k]; k++; } } string typeLength = contents1.Length + ";" + contents2.Length; string types = "text/html;image/gif";//我这里写的是个死的，仅仅是为了测试向数据库中插入图片和文字 //插入数据库 InsertBytesValue(contents, typeLength, types); } protected void btnRead_Click(object sender, EventArgs e) { byte[] testStr = ConvertToByte("测试文字和图片哦。呵呵。"); string connStr = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["connStr"].ConnectionString; SqlConnection conn = new SqlConnection(connStr); try { conn.Open(); string cmdStr = "select top 1 * from test1 where proContent is not null order by [id] desc"; SqlDataAdapter sda = new SqlDataAdapter(cmdStr, conn); DataSet ds = new DataSet(); sda.Fill(ds); string str = string.Empty; foreach (DataRow dr in ds.Tables[0].Rows) { byte[] contents = (byte[])dr["proContent"];//所有的二进制流 string typeLength=dr["typeLength"].ToString();//不同类型的二进制长度 string types = dr["types"].ToString();//不同类型的二进制的类型集合 if (typeLength.IndexOf(';') == -1) { byte[] newContents = contents; Response.ContentEncoding = System.Text.UTF8Encoding.Default; Response.ContentType = this.DropDownList1.SelectedItem.Text; Response.BinaryWrite(contents); } else { //类型的个数 int typeCount = typeLength.Split(new char[] { ';' }).Length - 1; for (int i = 0; i < typeCount; i++) { string type0 = types.Split(new char[]{';'})[i]; int len0 = int.Parse(typeLength.Split(new char[]{';'})[i]); byte[] part0 = new byte[len0]; byte[] part1 = new byte[(contents.Length-len0)]; int k = 0; for (int j = 0; j < contents.Length; j++) { if (j < len0) { part0[j] = contents[j]; } else { part1[k] = contents[j]; k++; } } string res = string.Empty; res = ConvertToString(part0); MemoryStream ms = new MemoryStream(); ms.Write(part1, 0, part1.Length); System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(ms); string path = AppDomain.CurrentDomain.BaseDirectory + "Temp//"; string fileName = DateTime.Now.ToString("yyyyMMddhhmmss")+".gif"; string filePath = path + fileName; bmp.Save(filePath); res += "<img src="/" mce_src="/""Temp/"+fileName+"/"/>"; Response.Write(res); } //Response.Write(str); } catch (Exception ex) { Response.Write(ex.Message); throw; } finally { conn.Close(); } } //二进制转字符串： private string ConvertToString(byte[] thebyte) { char[] Chars = new char[System.Text.Encoding.Default.GetCharCount(thebyte, 0, thebyte.Length)]; System.Text.Encoding.Default.GetChars(thebyte, 0, thebyte.Length, Chars, 0); string newString = new string(Chars); return newString; } //字符串转二进制： private byte[] ConvertToByte(string theString) { byte[] byteStream = System.Text.Encoding.Default.GetBytes(theString); return byteStream; } /// <summary> /// 向数据库中拷入二进制数据的方法 /// </summary> /// <param name="contents">二进制数组</param> /// <param name="typeLength">不同类型二进制数据的长度（以分号分隔）</param> /// <param name="types">不同类型二进制数据类型（以分号分隔）</param> private void InsertBytesValue(byte[] contents,string typeLength,string types) { string connStr = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["connStr"].ConnectionString; SqlConnection conn = new SqlConnection(connStr); try { conn.Open(); string cmdStr = "insert into test1(proContent,typeLength,types) values(@para1,@para2,@para3)"; SqlCommand cmd = new SqlCommand(cmdStr, conn); cmd.Parameters.Add("@para1", SqlDbType.Image); cmd.Parameters.Add("@para2",SqlDbType.VarChar,1000); cmd.Parameters.Add("@para3", SqlDbType.VarChar, 1000); //byte[] contents = ConvertToByte("测试一下子"); cmd.Parameters["@para1"].Value = contents; cmd.Parameters["@para2"].Value = typeLength; cmd.Parameters["@para3"].Value = types; int res = cmd.ExecuteNonQuery(); if (res > 0) { Response.Write("<mce:script type="text/javascript"></mce:script>"); } } catch (Exception ex) { Response.Write(ex.Message); throw; } finally { conn.Close(); } } }

C#以二制的方式同时存储文字和图片到sqlserver，并读取

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