C# 鏈接數據庫並查詢操作

1、點擊視圖，點擊服務器資源管理

 

 2、點擊鏈接到數據庫

 

 

 

 3、在出來的界面中點擊數據源，點擊下圖所示

 

 4、選擇數據庫名等

 

 服務器名在SQL看

 

 

 

 

 

 這個字符串就是需要建立實例的參數

 

5、在click事件中可以這樣寫代碼

SqlConnection comn = new SqlConnection("Data Source = JINQI; Initial Catalog = Test; Integrated Security = True");
            try
            {
                string search = "select * from matnr where(0=0)";
                if (this.textBox1.Text.Length>0)
                {
                    search = search + " and 物料編碼=" + "'" + textBox1.Text + "'";
                }
                if (this.textBox2.Text.Length > 0)
                {
                    search = search + " and 物料描述=" + "'" + textBox2.Text + "'";
                }
                SqlDataAdapter sda = new SqlDataAdapter(search, comn);
                DataSet ds = new DataSet();
                sda.Fill(ds);
                dataGridView1.DataSource = ds.Tables[0];
                dataGridView1.RowHeadersVisible = false;


            }
            catch (Exception EX)
            {

                MessageBox.Show(EX.Message+EX.StackTrace);
            }