ListView控件绑定DataSet

DataSet数据集，数据缓存在客户端内存中，支持断开式连接.

  在对DataSet做操作的时候，首先一定要修改其行的状态,然后执行SqlDataAdapter的Update方法,Update方法根据其行的状态,做相应的SelectCommand、DeleteCommand、UpdateCommand、InsertCommand操作.

一,ListView控件绑定DataSet之操作: 

1）查找操作

using (SqlConnection con = new SqlConnection(constring))

            {

                //con.Open();

                ds = new DataSet();

                StringBuilder sb = new StringBuilder();

                sb.Append("select stucode,spcode,ctcode,stunits from stunits");

                dapt = new SqlDataAdapter(sb.ToString(), con);

                try

                {

                    dapt.Fill(ds, "stunit");

                    //循环遍历表中的行

                    foreach (DataRow dr in ds.Tables[0].Rows)

                    {

                        ListViewItem item = this.listView1.Items.Add(dr[0].ToString().Trim());

                        item.SubItems.Add(dr[1].ToString().Trim());

                        item.SubItems.Add(dr[2].ToString().Trim());

                        item.SubItems.Add(dr[3].ToString().Trim()); 

                    }

                }

                catch (SystemException ex)

                {

                    MessageBox.Show(ex.Message);

                    //MessageBox.Show("出错");

                }

            }

2)修改操作

        private void UpdateDatabase()

        {

            StringBuilder sb = new StringBuilder();

            sb.Append("update stunits set stucode=@stucode,spcode=@spcode,ctcode=@ctcode,stunits=@stunits where stucode='" + this.Listv.SelectedItems[0].Text + "' ");

            using (SqlConnection con = new SqlConnection("server=.;uid=sa;pwd=system;database=jtyyhis"))

            {

 

                SqlCommand cmd = new SqlCommand(sb.ToString(), con);

                this.dapt = new SqlDataAdapter();

                dapt.UpdateCommand = cmd;

                dapt.UpdateCommand.Parameters.Add("@stucode", SqlDbType.VarChar, 10);

                dapt.UpdateCommand.Parameters.Add("@spcode", SqlDbType.VarChar, 10);

                dapt.UpdateCommand.Parameters.Add("@ctcode", SqlDbType.VarChar, 10);

                dapt.UpdateCommand.Parameters.Add("@stunits", SqlDbType.VarChar, 40);

                dapt.UpdateCommand.Parameters[0].Value = this.textBox1.Text;

                dapt.UpdateCommand.Parameters[1].Value = this.textBox2.Text;

                dapt.UpdateCommand.Parameters[2].Value = this.textBox3.Text;

                dapt.UpdateCommand.Parameters[3].Value = this.textBox4.Text;

 

                 //得到当前行的索引

                int index = this.Listv.SelectedIndices[0];

                //修改行状态,使其状态成为Modified

                ds.Tables[0].Rows[index].SetModified();

                if (ds.HasChanges(DataRowState.Modified))

                {

                    try

                    {

                        dapt.Update(ds, "stunit");

                        MessageBox.Show("修改成功");

                    }

                    catch (DBConcurrencyException ex1)

                    {

                        MessageBox.Show(ex1.Message + " " + ex1.StackTrace);

                    }

                    catch (SqlException ex)

                    {

                        MessageBox.Show(ex.Message);

                    }

 

                }

            }

3)增加操作

        private void btnAdd_Click(object sender, EventArgs e)

        {

            if (this.textBox1.Text == string.Empty)

            {

                MessageBox.Show("代码不能为空", "提示");

            }

            else

            {

                using (SqlConnection con = new SqlConnection(constring))

                {

                    //con.Open();

                    StringBuilder sb = new StringBuilder();

                    sb.Append("insert into stunits(stucode,spcode,ctcode,stunits) values(@dm,@pym,@dym,@stunit)");

                    dapt = new SqlDataAdapter();

                    //产生一个新行

                    DataRow dr = ds.Tables[0].NewRow();

                    dr[0] = this.textBox1.Text;

                    dr[1] = this.textBox2.Text;

                    dr[2] = this.textBox3.Text;

                    dr[3] = this.textBox4.Text;

                    //将新行添加到ds.Tables[0].Rows中

                    ds.Tables[0].Rows.Add(dr);

                    SqlCommand cmd = new SqlCommand(sb.ToString(), con);

                    cmd.Parameters.Add("@dm", SqlDbType.VarChar, 10, "stucode");

                    cmd.Parameters.Add("@pym", SqlDbType.VarChar, 20, "spcode");

                    cmd.Parameters.Add("@dym", SqlDbType.VarChar, 20, "ctcode");

                    cmd.Parameters.Add("@stunit", SqlDbType.VarChar, 40, "stunits");

                    dapt.InsertCommand = cmd;

                    //dapt.InsertCommand = new SqlCommand(sb.ToString(), con);

                    //dapt.InsertCommand.Parameters.Add("@dm", SqlDbType.Int,10,"stucode");

                    //dapt.InsertCommand.Parameters.Add("@pym", SqlDbType.VarChar,20,"spcode");

                    //dapt.InsertCommand.Parameters.Add("@dym", SqlDbType.VarChar,20,"ctcode");

                    //dapt.InsertCommand.Parameters.Add("@stunit",SqlDbType.VarChar,40,"stunits");

                    try

                    {

                        dapt.Update(ds, "stunit");

                        MessageBox.Show("添加成功");

                    }

                    catch (ArgumentNullException ex)

                    {

                        MessageBox.Show(ex.Message);

                    }

                    catch (SqlException ex1)

                    {

                        MessageBox.Show(ex1.Message);

                    }

 

                }

 4)删除操作

     private void btnDele_Click(object sender, EventArgs e)

        {

            //ds = new DataSet();

            using (SqlConnection con = new SqlConnection(constring))

            {

                //con.Open();

                StringBuilder sb = new StringBuilder();

                sb.Append("delete stunits where stucode='" + this.listView1.SelectedItems[0].Text + "'");

                SqlCommand cmd = new SqlCommand(sb.ToString(), con);

                dapt = new SqlDataAdapter();

                dapt.DeleteCommand = cmd;

                int index = this.listView1.SelectedIndices[0];//得到选中行的索引

                ds.Tables["stunit"].Rows[index].Delete();//改变行的状态

                //try

                //{

                //    int Count = cmd.ExecuteNonQuery();

                //    if (Count > 0) MessageBox.Show("删除成功", "提示");

                //}

                //catch (SqlException ex)

                //{

                //    MessageBox.Show(ex.Message);

                //}

                if (ds.HasChanges(DataRowState.Deleted))

                {

                    try

                    {

                        dapt.Update(ds, "stunit");

                        MessageBox.Show("删除成功", "提示");

                    }

                    catch (SqlException ex)

                    {

                        MessageBox.Show(ex.Message, "提示");