100165623.htm
来自「C#高级编程(第三版),顶死你们。。 。up」· HTM 代码 · 共 248 行 · 第 1/3 页
HTM
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<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> retrieveButton.Location = new System.Drawing.Point(384, 224);</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> retrieveButton.Size = new System.Drawing.Size(75, 23);</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> retrieveButton.TabIndex = 1;</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> retrieveButton.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> retrieveButton.Text = "Retrieve";</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> retrieveButton.Click += new </span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> System.EventHandler(this.retrieveButton_Click);</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> this.Controls.Add(this.retrieveButton);</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> protected void retrieveButton_Click(object sender, System.EventArgs e)</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="a6" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"> retrieveButton.Enabled = false;</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">这些代码生成将要使用的</span><span lang="EN-US">DataSet</span><span style="FONT-FAMILY: 宋体">，接着创建了本例中要使用的</span><span lang="EN-US">DataGridTableStyle</span><span style="FONT-FAMILY: 宋体">，最后把</span><span lang="EN-US">DataGrid</span><span style="FONT-FAMILY: 宋体">绑定到</span><span lang="EN-US">DataSet</span><span style="FONT-FAMILY: 宋体">上。</span><span lang="EN-US">CreateDataSet</span><span style="FONT-FAMILY: 宋体">函数并不是新东西，它可以从</span><span lang="EN-US">Customers</span><span style="FONT-FAMILY: 宋体">表中选择出所有的行。</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"> DataSet ds = CreateDataSet();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> CreateStyles(dataGrid);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> dataGrid.SetDataBinding(ds, "Customers");</span></p>
<p class="2" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="MsoNormal"><span lang="EN-US">CreateStyles()</span><span style="FONT-FAMILY: 宋体">方法比较有趣。前几行代码创建新的</span><span lang="EN-US">DataGridTableStyle</span><span style="FONT-FAMILY: 宋体">对象，并且设置了它的</span><span lang="EN-US">MappingName</span><span style="FONT-FAMILY: 宋体">属性，这个属性在</span><span lang="EN-US">DataGrid</span><span style="FONT-FAMILY: 宋体">显示一个给定的</span><span lang="EN-US">DataTable</span><span style="FONT-FAMILY: 宋体">时使用。</span><span lang="EN-US">DataGrid</span><span style="FONT-FAMILY: 宋体">可以用交替变化的颜色显示数据行。这段代码还每隔一行定义数据行的颜色</span><span lang="EN-US">(</span><span style="FONT-FAMILY: 宋体">结果如图</span><span lang="EN-US">22-11</span><span style="FONT-FAMILY: 宋体">所示</span><span lang="EN-US">)</span><span style="FONT-FAMILY: 宋体">：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"> private void CreateStyles(DataGrid dg)</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> DataGridTableStyle style = new DataGridTableStyle();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> style.MappingName = "Customers";</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> style.AlternatingBackColor = System.Drawing.Color.Bisque;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> DataGridTextBoxColumn customerID = new DataGridTextBoxColumn();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> customerID.HeaderText = "Customer ID";</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> customerID.MappingName = "CustomerID";</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> customerID.Width = 200;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> DataGridTextBoxColumn name = new DataGridTextBoxColumn();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> name.HeaderText = "Name";</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> name.MappingName = "CompanyName";</span></p>
<p class="2" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"> name.Width = 300;</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">在定义了数据列后，就把它们添加到</span><span lang="EN-US">DataGridTableStyle</span><span style="FONT-FAMILY: 宋体">对象的</span><span lang="EN-US">GridColumnStyles</span><span style="FONT-FAMILY: 宋体">集合中，该对象本身则被添加到</span><span lang="EN-US">DataGrid </span><span style="FONT-FAMILY: 宋体">的属性</span><span lang="EN-US">TableStyles</span><span style="FONT-FAMILY: 宋体">上：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><a ftel="TableStyles"><span lang="EN-US"> style.GridColumnStyles.AddRange</span></a></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> (new DataGridColumnStyle[]{customerID , name});</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> dg.TableStyles.Add(style);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> private DataSet CreateDataSet()</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> string source = "server=(local)\\NetSDK;" + </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> "uid=QSUser;pwd=QSPassword;" + </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> "database=northwind";</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> string customers = "SELECT * FROM Customers";</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> SqlConnection con = new SqlConnection(source);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> SqlDataAdapter da = new SqlDataAdapter(customers , con);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> DataSet ds = new DataSet();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> da.Fill(ds, "Customers");</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> return ds;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> static void Main() </span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> Application.Run(new CustomDataGridTableStyle());</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="a6" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">}</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">在创建了</span><span lang="EN-US">DataGridTableStyle</span><span style="FONT-FAMILY: 宋体">对象后，就创建了两个派生于</span><span lang="EN-US">DataGridColumnStyle</span><span style="FONT-FAMILY: 宋体">的对象，在本实例中，是两个文本框。每一列都定义了许多属性，见表</span><span lang="EN-US">22-3</span><span style="FONT-FAMILY: 宋体">。</span></p>
<p class="a5" style="MARGIN-TOP: 8.15pt" align="center"><span style="FONT-FAMILY: 黑体">表</span><span lang="EN-US"> 22-3</span></p>
<div align="center">
<table class="MsoNormalTable" style="MARGIN-LEFT: -2.45pt; BORDER-TOP-STYLE: none; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; BORDER-COLLAPSE: collapse; BORDER-BOTTOM-STYLE: none" cellspacing="0" cellpadding="0" border="1">
<tbody>
<tr>
<td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 9.9pt; BORDER-LEFT-WIDTH: 1pt; BORDER-LEFT-COLOR: windowtext; PADDING-BOTTOM: 0cm; WIDTH: 132.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid" valign="top" width="177">
<p class="a2"><span style="FONT-FAMILY: 黑体">属</span><span lang="EN-US" style="FONT-FAMILY: 'Times New Roman'"> </span><span style="FONT-FAMILY: 黑体">性</span></p>
</td>
<td style="PADDING-RIGHT: 9.9pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 0cm; WIDTH: 305.05pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none" valign="top" width="407">
<p class="a2"><span style="FONT-FAMILY: 黑体">说</span><span lang="EN-US" style="FONT-FAMILY: 'Times New Roman'"> </span><span style="FONT-FAMILY: 黑体">明</span></p>
</td>
</tr>
<tr>
<td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 0cm; WIDTH: 132.85pt; BORDER-TOP-STYLE: none; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT-STYLE: none" valign="top" width="177">
<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">Alignment</span></p>
</td>
<td style="PADDING-RIGHT: 9.9pt; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 0cm; WIDTH: 305.05pt; BORDER-TOP-STYLE: none; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none" valign="top" width="407">
<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">HorizontalAlignment</span><span style="FONT-FAMILY: 宋体">枚举的一个值<span style="LETTER-SPACING: -1pt">——</span></span><span lang="EN-US" style="LETTER-SPACING: -1pt"> </span><span lang="EN-US">Left</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US"> Center</span><span style="FONT-FAMILY: 宋体">或</span><span lang="EN-US"> Right</span><span style="FONT-FAMILY: 宋体">，这表示列中数据的对齐方式</span><span lang="EN-US"> </span></p>
</td>
</tr>
<tr>
<td style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 9.9pt; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 0cm; WIDTH: 132.85pt; BORDER-TOP-STYLE: none; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT-STYLE: none" valign="top" width="177">
<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">FontHeight</span></p>
</td>
<td style="PADDING-RIGHT: 9.9pt; PADDING-LEFT: 9.9pt; PADDING-BOTTOM: 0cm; WIDTH: 305.05pt; BORDER-TOP-STYLE: none; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none" valign="top" width="407">
<p class="a4" style="MARGIN-LEFT: 10.7pt"><span style="FONT-FAMILY: 宋体">字体的大小</span><span lang="EN-US">(</span><span style="FONT-FAMILY: 宋体">像素</span><span lang="EN-US">)</span><span style="FONT-FAMILY: 宋体">，如果没有给它设置值，就使用</span><span lang="EN-US">DataGrid</span><span style="FONT-FAMILY: 宋体">的默认值。这个属性是受保护的，只有在创建自己的子类时，才能修改它</span></p>
</td>
</tr>
<tr>
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