C#实现XML文件操作详解

public partial class Form1 : Form { public Form1() { InitializeComponent(); } static public string strName = "";//记录读取时XML文件路径 static public string strOne = "";//定义两个变量保存文本框内的值 static public string strTwo = ""; static public string strThree = "";//保存子标记名称 static public string strFour = "";//保存第二个子节点的属性名 static public string strFive = "";//保存第二个节点的属性值 static public string strSix = "";//保存节点路径 private XmlDocument xmlDocument = new XmlDocument(); private XmlNode xmlNode; private XmlElement xmlElement; DataSet dataSet = new DataSet();//声明此数据集，存储读取出的XML数据 private void Form1_Load(object sender, EventArgs e) { strName = "fileTwo.xml"; if (File.Exists(strName)) { ShowXml(); button3.Enabled = false; } else { button3.Enabled = true; } } //修改创建的XML文件 private void button7_Click(object sender, EventArgs e) { //修改第一个节点的属性 xmlDocument.Load(strName); XmlNode nodeOne = xmlDocument.SelectSingleNode("//" + strThree); XmlElement ElementOne = (XmlElement)nodeOne; ElementOne.SetAttribute(attribute.Text, textBox4.Text); //修改第一个节点的值 XmlNode nodeTwo = xmlDocument.SelectSingleNode("//" + strThree + "/*"); XmlElement ElementTwo = (XmlElement)nodeTwo; ElementTwo.InnerText = nodeContent.Text; //修改第二个节点的属性值 XmlNode mainNodeThree = xmlDocument.SelectSingleNode("//" + textBox7.Text + "[@" + strFour + "='" + strFive + "']"); XmlElement ElementThree = (XmlElement)mainNodeThree; ElementThree.SetAttribute(textBox10.Text, textBox8.Text); //修改第二个节点的值 XmlNode nodeFour = xmlDocument.SelectSingleNode("//" + textBox7.Text + "[@" + strFour + "='" + textBox8.Text + "']/*"); XmlElement ElementFour = (XmlElement)nodeFour; ElementFour.InnerText = textBox11.Text; xmlDocument.Save(strName); MessageBox.Show("恭喜你，修改成功！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Asterisk); ShowXml(); } private void dataGridView1_SelectionChanged(object sender, EventArgs e) { //修改文本框的ReadOnly属性 readOnlytrue(); //选定DataGridView中的一条记录在文本框内显示 for (int i = 0; i  0) { textBox11.Text = dataGridView1.Rows[i].Cells[childNode.Text].Value.ToString(); textBox8.Text = dataGridView1.Rows[i].Cells[attribute.Text].Value.ToString(); strTwo = textBox11.Text; strFive = textBox8.Text; } } } //从指定路径加载XML文档 xmlDocument.Load(strName); //从根节点开始读取 XmlNode xNode = (XmlNode)xmlDocument.DocumentElement; root.Text = xNode.Name; //读取子节点的属性及内容 XmlNode nodeTwo = xmlDocument.SelectSingleNode(root.Text + "/*"); firstNode.Text = nodeTwo.Name; textBox7.Text = firstNode.Text; strThree = firstNode.Text; //读取次子节点的名称及内容 XmlNode nodeThree = xmlDocument.SelectSingleNode(root.Text + "/" + firstNode.Text + "/*"); childNode.Text = nodeThree.Name; textBox9.Text = childNode.Text; //读取指定节点的属性名 XmlNode nodeOne = xmlDocument.SelectSingleNode("//" + firstNode.Text); XmlAttributeCollection xmlAttribute = nodeOne.Attributes; for (int i = 0; i 

partial class Form1 { /// 
 /// 必需的设计器变量。 /// 
 private System.ComponentModel.IContainer components = null; /// 
 /// 清理所有正在使用的资源。 /// 
 /// 如果应释放托管资源，为 true；否则为 false。 protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows 窗体设计器生成的代码 /// 
 /// 设计器支持所需的方法 - 不要 /// 使用代码编辑器修改此方法的内容。 /// 
 private void InitializeComponent() { this.groupBox5 = new System.Windows.Forms.GroupBox(); this.dataGridView1 = new System.Windows.Forms.DataGridView(); this.label18 = new System.Windows.Forms.Label(); this.root = new System.Windows.Forms.TextBox(); this.textBox4 = new System.Windows.Forms.TextBox(); this.firstNode = new System.Windows.Forms.TextBox(); this.childNode = new System.Windows.Forms.TextBox(); this.attribute = new System.Windows.Forms.TextBox(); this.groupBox6 = new System.Windows.Forms.GroupBox(); this.label20 = new System.Windows.Forms.Label(); this.nodeContent = new System.Windows.Forms.TextBox(); this.label17 = new System.Windows.Forms.Label(); this.label19 = new System.Windows.Forms.Label(); this.label16 = new System.Windows.Forms.Label(); this.label15 = new System.Windows.Forms.Label(); this.groupBox2 = new System.Windows.Forms.GroupBox(); this.button2 = new System.Windows.Forms.Button(); this.button1 = new System.Windows.Forms.Button(); this.button7 = new System.Windows.Forms.Button(); this.label5 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label(); this.groupBox1 = new System.Windows.Forms.GroupBox(); this.textBox1 = new System.Windows.Forms.TextBox(); this.textBox6 = new System.Windows.Forms.TextBox(); this.textBox2 = new System.Windows.Forms.TextBox(); this.textBox3 = new System.Windows.Forms.TextBox(); this.label4 = new System.Windows.Forms.Label(); this.textBox5 = new System.Windows.Forms.TextBox(); this.label3 = new System.Windows.Forms.Label(); this.label1 = new System.Windows.Forms.Label(); this.label9 = new System.Windows.Forms.Label(); this.label8 = new System.Windows.Forms.Label(); this.groupBox4 = new System.Windows.Forms.GroupBox(); this.textBox7 = new System.Windows.Forms.TextBox(); this.button3 = new System.Windows.Forms.Button(); this.label23 = new System.Windows.Forms.Label(); this.label22 = new System.Windows.Forms.Label(); this.label21 = new System.Windows.Forms.Label(); this.label10 = new System.Windows.Forms.Label(); this.textBox11 = new System.Windows.Forms.TextBox(); this.textBox10 = new System.Windows.Forms.TextBox(); this.textBox9 = new System.Windows.Forms.TextBox(); this.textBox8 = new System.Windows.Forms.TextBox(); this.groupBox5.SuspendLayout(); ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit(); this.groupBox6.SuspendLayout(); this.groupBox2.SuspendLayout(); this.groupBox1.SuspendLayout(); this.groupBox4.SuspendLayout(); this.SuspendLayout(); // // groupBox5 // this.groupBox5.Controls.Add(this.dataGridView1); this.groupBox5.Location = new System.Drawing.Point(12, 134); this.groupBox5.Name = "groupBox5"; this.groupBox5.Size = new System.Drawing.Size(748, 161); this.groupBox5.TabIndex = 1313; this.groupBox5.TabStop = false; this.groupBox5.Text = "显示XML文件内容"; // // dataGridView1 // this.dataGridView1.AllowUserToAddRows = false; this.dataGridView1.BackgroundColor = System.Drawing.SystemColors.ActiveCaption; this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize; this.dataGridView1.Location = new System.Drawing.Point(2, 12); this.dataGridView1.MultiSelect = false; this.dataGridView1.Name = "dataGridView1"; this.dataGridView1.RowTemplate.Height = 23; this.dataGridView1.Size = new System.Drawing.Size(745, 151); this.dataGridView1.TabIndex = 1306; this.dataGridView1.SelectionChanged += new System.EventHandler(this.dataGridView1_SelectionChanged); // // label18 // this.label18.AutoSize = true; this.label18.Location = new System.Drawing.Point(9, 17); this.label18.Name = "label18"; this.label18.Size = new System.Drawing.Size(65, 12); this.label18.TabIndex = 1308; this.label18.Text = "初始节点："; // // root // this.root.Location = new System.Drawing.Point(80, 14); this.root.Name = "root"; this.root.Size = new System.Drawing.Size(100, 21); this.root.TabIndex = 0; // // textBox4 // this.textBox4.Location = new System.Drawing.Point(266, 42); this.textBox4.Name = "textBox4"; this.textBox4.Size = new System.Drawing.Size(100, 21); this.textBox4.TabIndex = 3; // // firstNode // this.firstNode.Location = new System.Drawing.Point(265, 12); this.firstNode.Name = "firstNode"; this.firstNode.Size = new System.Drawing.Size(100, 21); this.firstNode.TabIndex = 1; // // childNode // this.childNode.Location = new System.Drawing.Point(80, 70); this.childNode.Name = "childNode"; this.childNode.Size = new System.Drawing.Size(100, 21); this.childNode.TabIndex = 4; // // attribute // this.attribute.Location = new System.Drawing.Point(80, 42); this.attribute.Name = "attribute"; this.attribute.Size = new System.Drawing.Size(100, 21); this.attribute.TabIndex = 2; // // groupBox6 // this.groupBox6.Controls.Add(this.label18); this.groupBox6.Controls.Add(this.root); this.groupBox6.Controls.Add(this.textBox4); this.groupBox6.Controls.Add(this.firstNode); this.groupBox6.Controls.Add(this.childNode); this.groupBox6.Controls.Add(this.attribute); this.groupBox6.Controls.Add(this.label20); this.groupBox6.Controls.Add(this.nodeContent); this.groupBox6.Controls.Add(this.label17); this.groupBox6.Controls.Add(this.label19); this.groupBox6.Controls.Add(this.label16); this.groupBox6.Controls.Add(this.label15); this.groupBox6.Location = new System.Drawing.Point(12, 12); this.groupBox6.Name = "groupBox6"; this.groupBox6.Size = new System.Drawing.Size(371, 116); this.groupBox6.TabIndex = 1310; this.groupBox6.TabStop = false; this.groupBox6.Text = "节点一"; // // label20 // this.label20.AutoSize = true; this.label20.Location = new System.Drawing.Point(195, 45); this.label20.Name = "label20"; this.label20.Size = new System.Drawing.Size(53, 12); this.label20.TabIndex = 1315; this.label20.Text = "属性值："; // // nodeContent // this.nodeContent.Location = new System.Drawing.Point(266, 70); this.nodeContent.Name = "nodeContent"; this.nodeContent.Size = new System.Drawing.Size(100, 21); this.nodeContent.TabIndex = 5; // // label17 // this.label17.AutoSize = true; this.label17.Location = new System.Drawing.Point(195, 17); this.label17.Name = "label17"; this.label17.Size = new System.Drawing.Size(53, 12); this.label17.TabIndex = 1310; this.label17.Text = "子标记："; // // label19 // this.label19.AutoSize = true; this.label19.Location = new System.Drawing.Point(189, 76); this.label19.Name = "label19"; this.label19.Size = new System.Drawing.Size(65, 12); this.label19.TabIndex = 1313; this.label19.Text = "标记内容："; // // label16 // this.label16.AutoSize = true; this.label16.Location = new System.Drawing.Point(9, 45); this.label16.Name = "label16"; this.label16.Size = new System.Drawing.Size(65, 12); this.label16.TabIndex = 1311; this.label16.Text = "属性名称："; // // label15 // this.label15.AutoSize = true; this.label15.Location = new System.Drawing.Point(9, 75); this.label15.Name = "label15"; this.label15.Size = new System.Drawing.Size(65, 12); this.label15.TabIndex = 1312; this.label15.Text = "次子标记："; // // groupBox2 // this.groupBox2.Controls.Add(this.button2); this.groupBox2.Controls.Add(this.button1); this.groupBox2.Controls.Add(this.button7); this.groupBox2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.groupBox2.Location = new System.Drawing.Point(399, 301); this.groupBox2.Name = "groupBox2"; this.groupBox2.Size = new System.Drawing.Size(360, 110); this.groupBox2.TabIndex = 1312; this.groupBox2.TabStop = false; this.groupBox2.Text = "操作类型"; // // button2 // this.button2.Location = new System.Drawing.Point(277, 37); this.button2.Name = "button2"; this.button2.Size = new System.Drawing.Size(63, 23); this.button2.TabIndex = 15; this.button2.Text = "删除记录"; this.button2.UseVisualStyleBackColor = true; this.button2.Click += new System.EventHandler(this.button2_Click); // // button1 // this.button1.Location = new System.Drawing.Point(34, 37); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(63, 23); this.button1.TabIndex = 14; this.button1.Text = "添加记录"; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.button1_Click); // // button7 // this.button7.Location = new System.Drawing.Point(158, 37); this.button7.Name = "button7"; this.button7.Size = new System.Drawing.Size(63, 23); this.button7.TabIndex = 13; this.button7.Text = "修改记录"; this.button7.UseVisualStyleBackColor = true; this.button7.Click += new System.EventHandler(this.button7_Click); // // label5 // this.label5.AutoSize = true; this.label5.Location = new System.Drawing.Point(16, 21); this.label5.Name = "label5"; this.label5.Size = new System.Drawing.Size(53, 12); this.label5.TabIndex = 1316; this.label5.Text = "子标记："; // // label2 // this.label2.AutoSize = true; this.label2.Location = new System.Drawing.Point(6, 49); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(65, 12); this.label2.TabIndex = 1312; this.label2.Text = "次子标记："; // // groupBox1 // this.groupBox1.Controls.Add(this.label5); this.groupBox1.Controls.Add(this.label2); this.groupBox1.Controls.Add(this.textBox1); this.groupBox1.Controls.Add(this.textBox6); this.groupBox1.Controls.Add(this.textBox2); this.groupBox1.Controls.Add(this.textBox3); this.groupBox1.Controls.Add(this.label4); this.groupBox1.Controls.Add(this.textBox5); this.groupBox1.Controls.Add(this.label3); this.groupBox1.Controls.Add(this.label1); this.groupBox1.Location = new System.Drawing.Point(14, 301); this.groupBox1.Name = "groupBox1"; this.groupBox1.Size = new System.Drawing.Size(369, 110); this.groupBox1.TabIndex = 1314; this.groupBox1.TabStop = false; this.groupBox1.Text = "添加节点"; // // textBox1 // this.textBox1.Location = new System.Drawing.Point(261, 46); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(100, 21); this.textBox1.TabIndex = 102; // // textBox6 // this.textBox6.Location = new System.Drawing.Point(89, 15); this.textBox6.Name = "textBox6"; this.textBox6.Size = new System.Drawing.Size(100, 21); this.textBox6.TabIndex = 100; // // textBox2 // this.textBox2.Location = new System.Drawing.Point(89, 46); this.textBox2.Name = "textBox2"; this.textBox2.Size = new System.Drawing.Size(100, 21); this.textBox2.TabIndex = 103; // // textBox3 // this.textBox3.Location = new System.Drawing.Point(261, 15); this.textBox3.Name = "textBox3"; this.textBox3.Size = new System.Drawing.Size(100, 21); this.textBox3.TabIndex = 101; // // label4 // this.label4.AutoSize = true; this.label4.Location = new System.Drawing.Point(202, 49); this.label4.Name = "label4"; this.label4.Size = new System.Drawing.Size(53, 12); this.label4.TabIndex = 1315; this.label4.Text = "属性值："; // // textBox5 // this.textBox5.Location = new System.Drawing.Point(89, 74); this.textBox5.Name = "textBox5"; this.textBox5.Size = new System.Drawing.Size(100, 21); this.textBox5.TabIndex = 104; // // label3 // this.label3.AutoSize = true; this.label3.Location = new System.Drawing.Point(12, 80); this.label3.Name = "label3"; this.label3.Size = new System.Drawing.Size(65, 12); this.label3.TabIndex = 1313; this.label3.Text = "标记内容："; // // label1 // this.label1.AutoSize = true; this.label1.Location = new System.Drawing.Point(190, 18); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(65, 12); this.label1.TabIndex = 1311; this.label1.Text = "属性名称："; // // label9 // this.label9.AutoSize = true; this.label9.Location = new System.Drawing.Point(17, 17); this.label9.Name = "label9"; this.label9.Size = new System.Drawing.Size(53, 12); this.label9.TabIndex = 1316; this.label9.Text = "子标记："; // // label8 // this.label8.AutoSize = true; this.label8.Location = new System.Drawing.Point(391, 20); this.label8.Name = "label8"; this.label8.Size = new System.Drawing.Size(0, 12); this.label8.TabIndex = 1309; // // groupBox4 // this.groupBox4.Controls.Add(this.label9); this.groupBox4.Controls.Add(this.label8); this.groupBox4.Controls.Add(this.textBox7); this.groupBox4.Controls.Add(this.button3); this.groupBox4.Controls.Add(this.label23); this.groupBox4.Controls.Add(this.label22); this.groupBox4.Controls.Add(this.label21); this.groupBox4.Controls.Add(this.label10); this.groupBox4.Controls.Add(this.textBox11); this.groupBox4.Controls.Add(this.textBox10); this.groupBox4.Controls.Add(this.textBox9); this.groupBox4.Controls.Add(this.textBox8); this.groupBox4.Location = new System.Drawing.Point(384, 12); this.groupBox4.Name = "groupBox4"; this.groupBox4.Size = new System.Drawing.Size(376, 116); this.groupBox4.TabIndex = 1311; this.groupBox4.TabStop = false; this.groupBox4.Text = "节点二"; // // textBox7 // this.textBox7.Location = new System.Drawing.Point(90, 11); this.textBox7.Name = "textBox7"; this.textBox7.Size = new System.Drawing.Size(100, 21); this.textBox7.TabIndex = 6; // // button3 // this.button3.Location = new System.Drawing.Point(319, 80); this.button3.Name = "button3"; this.button3.Size = new System.Drawing.Size(51, 23); this.button3.TabIndex = 11; this.button3.Text = "创建"; this.button3.UseVisualStyleBackColor = true; this.button3.Click += new System.EventHandler(this.button3_Click); // // label23 // this.label23.AutoSize = true; this.label23.Location = new System.Drawing.Point(211, 45); this.label23.Name = "label23"; this.label23.Size = new System.Drawing.Size(53, 12); this.label23.TabIndex = 1315; this.label23.Text = "属性值："; // // label22 // this.label22.AutoSize = true; this.label22.Location = new System.Drawing.Point(13, 76); this.label22.Name = "label22"; this.label22.Size = new System.Drawing.Size(65, 12); this.label22.TabIndex = 1313; this.label22.Text = "标记内容："; // // label21 // this.label21.AutoSize = true; this.label21.Location = new System.Drawing.Point(7, 45); this.label21.Name = "label21"; this.label21.Size = new System.Drawing.Size(65, 12); this.label21.TabIndex = 1312; this.label21.Text = "次子标记："; // // label10 // this.label10.AutoSize = true; this.label10.Location = new System.Drawing.Point(199, 14); this.label10.Name = "label10"; this.label10.Size = new System.Drawing.Size(65, 12); this.label10.TabIndex = 1311; this.label10.Text = "属性名称："; // // textBox11 // this.textBox11.Location = new System.Drawing.Point(90, 70); this.textBox11.Name = "textBox11"; this.textBox11.Size = new System.Drawing.Size(100, 21); this.textBox11.TabIndex = 10; // // textBox10 // this.textBox10.Location = new System.Drawing.Point(270, 11); this.textBox10.Name = "textBox10"; this.textBox10.Size = new System.Drawing.Size(100, 21); this.textBox10.TabIndex = 7; // // textBox9 // this.textBox9.Location = new System.Drawing.Point(90, 42); this.textBox9.Name = "textBox9"; this.textBox9.Size = new System.Drawing.Size(100, 21); this.textBox9.TabIndex = 9; // // textBox8 // this.textBox8.Location = new System.Drawing.Point(270, 42); this.textBox8.Name = "textBox8"; this.textBox8.Size = new System.Drawing.Size(100, 21); this.textBox8.TabIndex = 8; // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(765, 419); this.Controls.Add(this.groupBox5); this.Controls.Add(this.groupBox6); this.Controls.Add(this.groupBox2); this.Controls.Add(this.groupBox1); this.Controls.Add(this.groupBox4); this.Name = "Form1"; this.Text = "用C#操作XML文件"; this.Load += new System.EventHandler(this.Form1_Load); this.groupBox5.ResumeLayout(false); ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit(); this.groupBox6.ResumeLayout(false); this.groupBox6.PerformLayout(); this.groupBox2.ResumeLayout(false); this.groupBox1.ResumeLayout(false); this.groupBox1.PerformLayout(); this.groupBox4.ResumeLayout(false); this.groupBox4.PerformLayout(); this.ResumeLayout(false); } #endregion private System.Windows.Forms.GroupBox groupBox5; private System.Windows.Forms.DataGridView dataGridView1; private System.Windows.Forms.Label label18; private System.Windows.Forms.TextBox root; private System.Windows.Forms.TextBox textBox4; private System.Windows.Forms.TextBox firstNode; private System.Windows.Forms.TextBox childNode; private System.Windows.Forms.TextBox attribute; private System.Windows.Forms.GroupBox groupBox6; private System.Windows.Forms.Label label20; private System.Windows.Forms.TextBox nodeContent; private System.Windows.Forms.Label label17; private System.Windows.Forms.Label label19; private System.Windows.Forms.Label label16; private System.Windows.Forms.Label label15; private System.Windows.Forms.GroupBox groupBox2; private System.Windows.Forms.Button button2; private System.Windows.Forms.Button button1; private System.Windows.Forms.Button button7; private System.Windows.Forms.Label label5; private System.Windows.Forms.Label label2; private System.Windows.Forms.GroupBox groupBox1; private System.Windows.Forms.TextBox textBox1; private System.Windows.Forms.TextBox textBox6; private System.Windows.Forms.TextBox textBox2; private System.Windows.Forms.TextBox textBox3; private System.Windows.Forms.Label label4; private System.Windows.Forms.TextBox textBox5; private System.Windows.Forms.Label label3; private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label9; private System.Windows.Forms.Label label8; private System.Windows.Forms.GroupBox groupBox4; private System.Windows.Forms.TextBox textBox7; private System.Windows.Forms.Button button3; private System.Windows.Forms.Label label23; private System.Windows.Forms.Label label22; private System.Windows.Forms.Label label21; private System.Windows.Forms.Label label10; private System.Windows.Forms.TextBox textBox11; private System.Windows.Forms.TextBox textBox10; private System.Windows.Forms.TextBox textBox9; private System.Windows.Forms.TextBox textBox8; }