關聯數據庫

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1 public Form1() 2 { 3 InitializeComponent(); 4 5 //綁定省 6 comboBox1.DataSource = new ChinaData().Select("0001"); 7 comboBox1.DisplayMember = "AreaName"; 8 comboBox1.ValueMember = "AreaCode"; 9 10 //綁定市 11 comboBox2.DataSource = new ChinaData().Select(comboBox1.SelectedValue.ToString()); 12 comboBox2.DisplayMember = "AreaName"; 13 comboBox2.ValueMember = "AreaCode"; 14 15 //綁定區縣 16 comboBox3.DataSource = new ChinaData().Select(comboBox2.SelectedValue.ToString()); 17 comboBox3.DisplayMember = "AreaName"; 18 comboBox3.ValueMember = "AreaCode"; 19 20 } 21 22 private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) 23 { 24 //綁定市 25 comboBox2.DataSource = new ChinaData().Select(comboBox1.SelectedValue.ToString()); 26 comboBox2.DisplayMember = "AreaName"; 27 comboBox2.ValueMember = "AreaCode"; 28 } 29 30 private void comboBox2_SelectedIndexChanged(object sender, EventArgs e) 31 { 32 //綁定區縣 33 comboBox3.DataSource = new ChinaData().Select(comboBox2.SelectedValue.ToString()); 34 comboBox3.DisplayMember = "AreaName"; 35 comboBox3.ValueMember = "AreaCode"; 36 }

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轉載于:https://www.cnblogs.com/maxin991025-/p/6166043.html

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