ExcelÖÐÊý¾Ýµ¼Èëµ½SQL ServerÊý¾Ý¿â
using System.Data.SqlClient;
using System.Data.OleDb;
private void tsmiImportTeacherInfo_Click(object sender, EventArgs e)
{
DataSet ds;
if (ofdImport.ShowDialog()==DialogResult.OK)
{
ds = ImportExcel(this.ofdImport.FileName); //»ñµÃExcel
}
else
{
return;
}
int odr = 0;
SqlConnection cn = db.sqlconnection();
try
{
cn.Open();
string str = "insert into Teacher (TeacherId,Pwd,eachCourse,TeacherName) values(@TeacherId,@Pwd,@TeachCourse,@TeacherName)";
SqlCommand cmd = db.sqlcommand(str,cn);
int dsLength = ds.Tables[0].Rows.Count; //»ñµÃExcelÖÐÊý¾Ý³¤¶È
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table a(id, type):
id type
----------------------------------
1 1
2 1
3 &n ......
SQL> select * from t1;
ID AGE
---------- ----------
1 20
2&nbs ......
¡¡¡¡Ïò±íÖÐÔö¼ÓÒ»¸ö varchar ÁУº
¡¡¡¡ALTER TABLE distributors ADD COLUMN address varchar(30);
¡¡¡¡´Ó±íÖÐɾ³ýÒ»¸ö×ֶΣº
¡¡¡¡ALTER TABLE distributors DROP COLUMN address RESTRICT;
¡¡¡¡ÔÚÒ»¸ö²Ù×÷ÖÐÐÞ¸ÄÁ½¸öÏÖÓÐ×ֶεÄÀàÐÍ£º
¡¡¡¡ALTER TABLE distributors
¡¡¡¡ALTER COLUMN address TYPE varchar(80),
......