datagridview 数据处理方法 修改 删除 添加 下拉类表 弹出窗口

pagesum = int.Parse(label5.Text);

//设置 上一页 下一页 按钮的可用性

if (pagesum == 1) button7.Enabled = false;

else button7.Enabled = true;

button6.Enabled = true;

}

int[] intindex =new int[20]; //假设一张表上默认数据为20个

int selectindex = 0;

OleDbConnection conn;

OleDbDataAdapter adapter;

private DataTable dbconn(string strSql)

{

DataCon myconn = new DataCon();

conn = myconn.getCon();

this.adapter = new OleDbDataAdapter(strSql,conn);

DataTable dtSelect = new DataTable();

int rnt = this.adapter.Fill(dtSelect);

return dtSelect;

}

private Boolean dbUpdate()

{

string strSql = "select * from user_tb1";

DataTable dtUpdate = new DataTable();

dtUpdate = dbconn(strSql);

dtUpdate.Rows.Clear();

DataTable dtShow = new DataTable();

dtShow = (DataTable)this.dataGridView1.DataSource;

//dtUpdate.ImportRow(dtShow.Rows[intindex]); //如果不进行循环多行插入的话，只能够插入最后修改的一行数据。

for (int i = 0; i < 20;i++ )

{

if (intindex[i]!=255)

{