地磅称量系统之(37~39) 直接向数据库的数据表WtBill添加测试数据以及绑定用户控件和使用编码的方式控制dataGridView控件的每列属性和添加数据数据库的表中不存在的字段（非绑定列）

本文介绍如何通过SQL向地磅称量系统的WtBill表添加测试数据，并展示了一个C#应用程序示例，该程序实现了从数据库读取数据并将其绑定到用户界面的数据GridView控件上。

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地磅称量系统

37．直接通过SQL 向数据库里面名称为WtBill的表添加两条测试数据

INSERT INTO WtBill

(BillNo,VehicleNo,GrossTime,TraceTime,CargoName

,GrossWt,TraceWt,NetWt,Unit,CustomerName,Operator)

VALUES

('20080302-0001' ,N'粤B12345' ,'2008-3-2 10:30:00' ,'2008-3-2 14:36:50'

,N'重油', 908277 , 45082 , 863195,'kg' ,N'SH集团' ,N'郑紫至')

INSERT INTO WtBill

(BillNo,VehicleNo,GrossTime,TraceTime,CargoName

,GrossWt,TraceWt,NetWt,Unit,CustomerName,Operator)

VALUES

('20080302-0002' ,N'粤B66666' ,'2008-3-2 11:20:38' ,'2008-3-2 15:18:25'

,N'大米', 873644 , 57000 , 816644,'kg' ,N'JS集团' ,N'Peter')

38.显示绑定数据重新设置dataGridView1的每列属性添加参考System.Data.Linq

在代码编写之前添加两个命名空间

using LWSMapping;

using System.Linq;

代码如下所示（等一下再编写添加修改删除数据的代码而且实现起来非常的简单）：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using LWSMapping;

using System.Linq;

namespace WinApp

{

public partial class FrmWtBill : BaseForm.MyTemplateForm

{

public FrmWtBill()

{

InitializeComponent();

}

private WtBillMappingDataContext db;

private void FrmWtBill_Load(object sender, EventArgs e)

{

db = new WtBillMappingDataContext();

var WtBills = from a in db.WtBills

orderby a.BillNo

select a;

BindData();

this.bindingSource1.DataSource = WtBills;

//InitColumn()放在提供数据源控件之后初始化这样每列次序会按照我们预期的顺序排列。

//不使用编程方式来实现每列的属性也可以，在dataGridView1上直接编辑每列的属性。

InitColumn();

}

///<summary>

///将提供数据源的控件绑定到用户用来编辑数据的控件上

///</summary>

private void BindData()

{

this.txtBillNo.DataBindings.Add("Text", this.bindingSource1, "BillNo");

this.cmbVehicleNo.DataBindings.Add("Text", this.bindingSource1, "VehicleNo");

this.txtGrossTime.DataBindings.Add("Text", this.bindingSource1, "GrossTime");

this.txtTraceTime.DataBindings.Add("Text", this.bindingSource1, "TraceTime");

this.cmbCargoName.DataBindings.Add("Text", this.bindingSource1, "CargoName");

this.txtGrossWt.DataBindings.Add("Text", this.bindingSource1, "GrossWt");

this.txtTraceWt.DataBindings.Add("Text", this.bindingSource1, "TraceWt");

this.txtNetWt.DataBindings.Add("Text", this.bindingSource1, "NetWt");

this.cmbCustomerName.DataBindings.Add("Text", this.bindingSource1, "CustomerName");

this.txtOperator.DataBindings.Add("Text", this.bindingSource1, "Operator");

}

///<summary>

///使用编程的方式用来控制dataGridView控件的每列属性

///</summary>

private void InitColumn()

{

this.dataGridView1.Columns.Clear();

System.Windows.Forms.DataGridViewTextBoxColumn txtBoxColumn = null;

System.Windows.Forms.DataGridViewCheckBoxColumn checkBoxColumn = null;

checkBoxColumn = new System.Windows.Forms.DataGridViewCheckBoxColumn();

checkBoxColumn.DataPropertyName = "checkBox";

checkBoxColumn.Name = "checkBox";

checkBoxColumn.HeaderText = "打印";

checkBoxColumn.Width = 35;

checkBoxColumn.ReadOnly = false;

checkBoxColumn.DisplayIndex = 0;

this.dataGridView1.Columns.Add(checkBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "BillNo";

txtBoxColumn.Name = "BillNo";

txtBoxColumn.HeaderText = "单据编号";

txtBoxColumn.Width = 90;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 1;

this.dataGridView1.Columns.Add(txtBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "VehicleNo";

txtBoxColumn.Name = "VehicleNo";

txtBoxColumn.HeaderText = "车牌编号";

txtBoxColumn.Width = 70;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 2;

this.dataGridView1.Columns.Add(txtBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "GrossTime";

txtBoxColumn.Name = "GrossTime";

txtBoxColumn.HeaderText = "毛称时间";

txtBoxColumn.Width = 110;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 3;

this.dataGridView1.Columns.Add(txtBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "TraceTime";

txtBoxColumn.Name = "TraceTime";

txtBoxColumn.HeaderText = "皮称时间";

txtBoxColumn.Width = 110;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 4;

this.dataGridView1.Columns.Add(txtBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "CargoName";

txtBoxColumn.Name = "CargoName";

txtBoxColumn.HeaderText = "货物名称";

txtBoxColumn.Width = 70;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 5;

this.dataGridView1.Columns.Add(txtBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "GrossWt";

txtBoxColumn.Name = "GrossWt";

txtBoxColumn.HeaderText = "毛重";

txtBoxColumn.Width = 70;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 6;

this.dataGridView1.Columns.Add(txtBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "TraceWt";

txtBoxColumn.Name = "TraceWt";

txtBoxColumn.HeaderText = "皮重";

txtBoxColumn.Width = 70;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 7;

this.dataGridView1.Columns.Add(txtBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "NetWt";

txtBoxColumn.Name = "NetWt";

txtBoxColumn.HeaderText = "净重";

txtBoxColumn.Width = 70;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 8;

this.dataGridView1.Columns.Add(txtBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "Unit";

txtBoxColumn.Name = "Unit";

txtBoxColumn.HeaderText = "单位";

txtBoxColumn.Width = 35;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 9;

this.dataGridView1.Columns.Add(txtBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "CustomerName";

txtBoxColumn.Name = "CustomerName";

txtBoxColumn.HeaderText = "客户名称";

txtBoxColumn.Width = 120;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 10;

this.dataGridView1.Columns.Add(txtBoxColumn);

txtBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();

txtBoxColumn.DataPropertyName = "Operator";

txtBoxColumn.Name = "Operator";

txtBoxColumn.HeaderText = "司称人员";

txtBoxColumn.Width = 70;

txtBoxColumn.ReadOnly = true;

txtBoxColumn.SortMode = DataGridViewColumnSortMode.NotSortable;

txtBoxColumn.DisplayIndex = 11;

this.dataGridView1.Columns.Add(txtBoxColumn);

}

39．从数据库中读取数据到用户界面和绑定数据的效果图如下

注意：打印这列数据库的WtBill表内不包括这个字段的是在上面代码中添加进去的

所以很有必要使用编程的方式去控制dataGridView