winform实现Excel表格导入Sql数据库示例，首先要保证的是将要导入数据库的excel表格中的数据和数据库字段相符，excel中不能存在数据表中不存在的字段。获取excel文档完整路径，并将其中的数据生成dataset对象：
private DataSet xsldata(string filepath)
{
string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;IMEX=1'";
System.Data.OleDb.OleDbConnection Conn = new System.Data.OleDb.OleDbConnection(strCon);
string strCom = "SELECT * FROM [Sheet1$]";
Conn.Open();
System.Data.OleDb.OleDbDataAdapter myCommand = new System.Data.OleDb.OleDbDataAdapter(strCom, Conn);
DataSet ds = new DataSet();
myCommand.Fill(ds, "[Sheet1$]");
dataGridView1.DataSource = ds.Tables[0];
Conn.Close();
return ds;
}
完成之后把dataset对象导入数据库中，这里说明一下excel的头一行系统会默认为列名，不对其做导入操作，所以最好做个处理，这里我添加了列名。
private void button1_Click(object sender, EventArgs e)
{
if(txtpath.Text=="")
{
MessageBox.Show("请选择要导入的Excel文档！","系统提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
return;
}
string filepath=txtpath.Text;
SqlConnection conn =new SqlConnection(strcon);//链接数据库
conn.Open();
try
{
DataSet ds = new DataSet();
//取得数据集
//调用上面的函数
ds = xsldata(filepath);
//dataGridView2.DataSource = ds.Tables[0];
int errorcount = 0;//记录错误信息条数
int insertcount = 0;//记录插入成功条数
int updatecount = 0;//记录更新信息条数
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
int cardtypeid = Convert.ToInt32(ds.Tables[0].Rows[i][0].ToString());
string cardnum = ds.Tables[0].Rows[i][1].ToString();
string cardpwd = ds.Tables[0].Rows[i][2].ToString();
int officeid = Convert.ToInt32(ds.Tables[0].Rows[i][3].ToString());
DateTime stdt = Convert.ToDateTime(ds.Tables[0].Rows[i][4].ToString());
string cardstate= ds.Tables[0].Rows[i][5].ToString();
int userid=Convert.ToInt32(ds.Tables[0].Rows[i][6].ToString());
if (cardtypeid != 0 && cardnum != "" && cardpwd != "" && userid != 0 )
{
SqlCommand selectcmd = new SqlCommand("select count(*) from cardsinfo where CardNum='" + cardnum + "'and CardPwd='" + cardpwd + "' and CardState='1' and TypeID="+cardtypeid, conn);
int count = Convert.ToInt32(selectcmd.ExecuteScalar());
if (count > 0)
{
updatecount++;
}
else
{
SqlCommand insertcmd= new SqlCommand("insert into cardsinfo(TypeID,CardNum,CardPwd,OutByOffID,CardTime,CardState,CardByUser) values(" + cardtypeid + ",'" +
cardnum + "','" + cardpwd + "'," + officeid + ",'" + stdt+ "','1',"+userid+")", conn);
insertcmd.ExecuteNonQuery();
insertcount++;
}
}
else
{
//MessageBox.Show("电子表格信息有错！");
errorcount++;
;
}
}
MessageBox.Show( insertcount + "条数据导入成功！" + updatecount + "条数据重复！" + errorcount + "条数据部分信息为空没有导入！");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
conn.Close();
}
}
这样简单的excel电子表格导入数据库就完成了
