C#.NET中如何批量插入大量數據到數據庫中

2019-10-29 21:36:48

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這篇文章主要給大家介紹C#.net中如何批量插入大量數據到數據庫中，本文涉及到C#.net中批量插入數據到數據庫中方面的內容，對C#.net批量插入數據到數據庫中感興趣的朋友可以參考下本篇文章

在WEB項目開發過程中有時會碰到批量插入數據到數或者是將EXCEL文件據入到數據庫中.為了方便實現可以先將EXCEL導入到GRIDVIEW中然后一次批量插入.實現代碼如下:

前臺代碼

<asp:GridView ID="dgBom" runat="server" AutoGenerateColumns="false" CellPadding="1" CellSpacing="2">

<HeaderStyle BackColor="#ededed" />

<Columns>

<asp:TemplateField HeaderText="學號">

<ItemTemplate>

<asp:TextBox ID="studentnumber" runat="server" Text='<%#Eval("studentnumber") %>' ></asp:TextBox>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="學生姓名">

<ItemTemplate>

<asp:TextBox ID="studentname" runat="server" Text='<%#Eval("studentname") %>'></asp:TextBox>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

<asp:FileUpload ID="FileUpload1" runat="server" Font-Italic="False" />

<asp:Button ID="btn2" runat="server" OnClick="btn2_Click" Text="導入數據" />

<asp:Button ID="btninsert" runat="server" OnClick="btninsert_Click" Text="插入到數據庫中"/>

后臺代碼:

//首先在命名空間中加入以下兩行

using System.Data.SqlClient;

using System.Data.OleDb;

protected void btn2_Click(object sender, EventArgs e)

{

string filepath = FileUpload1.PostedFile.FileName;

ReadExcel(filepath, dgBom);

}

public void ReadExcel(string sExcelFile, GridView dgBom)

{

DataTable ExcelTable;

DataSet ds = new DataSet();

//Excel的連接

OleDbConnection objConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + sExcelFile + ";" + "Extended Properties=Excel 8.0;");

objConn.Open();

DataTable schemaTable = objConn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, null);

string tableName = schemaTable.Rows[0][2].ToString().Trim();//獲取 Excel 的表名，默認值是sheet1

string strSql = "select * from [" + tableName + "]";

OleDbCommand objCmd = new OleDbCommand(strSql, objConn);

OleDbDataAdapter myData = new OleDbDataAdapter(strSql, objConn);

myData.Fill(ds, tableName);//填充數據

dgBom.DataSource =ds;

dgBom.DataBind();

objConn.Close();

ExcelTable = ds.Tables[tableName];

int iColums = ExcelTable.Columns.Count;//列數

int iRows = ExcelTable.Rows.Count;//行數

//定義二維數組存儲 Excel 表中讀取的數據

string[,] storedata = new string[iRows, iColums];

for(int i=0;i<ExcelTable.Rows.Count;i++)

for (int j = 0; j < ExcelTable.Columns.Count; j++)

{

//將Excel表中的數據存儲到數組

storedata[i, j] = ExcelTable.Rows[i][j].ToString();

}

int excelBom = 0;//記錄表中有用信息的行數，有用信息是指除去表的標題和表的欄目，本例中表的用用信息是從第三行開始

//確定有用的行數

for (int k = 2; k < ExcelTable.Rows.Count; k++)

if (storedata[k, 1] != "")

excelBom++;

if (excelBom == 0)

{

Response.Write("<script language=javascript>alert('您導入的表格不合格式！')</script>");

}

else

{

//LoadDataToDataBase(storedata，excelBom)//該函數主要負責將 storedata 中有用的數據寫入到數據庫中，在此不是問題的關鍵省略

}

}

protected void btninsert_Click(object sender, EventArgs e)

{

foreach (GridViewRow gv in dgBom.Rows)

{

//我的連接字符串是寫在WEB.CONFIG中的.

string con = System.Configuration.ConfigurationManager.AppSettings["ConnectionString1"].ToString();

SqlConnection conn = new SqlConnection(con);

SqlCommand cmd = conn.CreateCommand();

cmd.CommandType = CommandType.Text;

cmd.CommandText = "insert into student (studentnumber,studentname) values(@studentnumber,@studentname)";

cmd.Parameters.Add("@studentnumber", SqlDbType.NVarChar, 20);

cmd.Parameters.Add("@studentname", SqlDbType.NVarChar, 10);

cmd.Parameters["@studentname"].Value = ((TextBox)gv.FindControl("studentname")).Text;

cmd.Parameters["@studentnumber"].Value = ((TextBox)gv.FindControl("studentnumber")).Text;

try

{

conn.Open();

cmd.ExecuteNonQuery();

conn.Close();

}

finally

{

if (conn != null)

conn.Dispose();

}

}

}