treeview文本展示

treeview文本显示

private void load_treeview()
        { 
            TreeNode guojia = new TreeNode();
            guojia.Text = "国家";
            treeView1.Nodes.Add(guojia);
        }
在load事件中调用该函数效果如图。怎么文本没有显示出来？求解
[解决办法]
把完整的代码贴出来看看
[解决办法]
完整的代码贴出来
[解决办法]
代码没有问题。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            TreeNode guojia = new TreeNode();
            guojia.Text = "国家";
            treeView1.Nodes.Add(guojia);
        }
    }
}

namespace WindowsFormsApplication1
{
    partial class Form1
    {
        /// <summary> 
 
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.treeView1 = new System.Windows.Forms.TreeView();
            this.SuspendLayout();
            // 
            // treeView1
            // 
            this.treeView1.Location = new System.Drawing.Point(35, 23);
            this.treeView1.Name = "treeView1"; 
 
            this.treeView1.Size = new System.Drawing.Size(149, 130);
            this.treeView1.TabIndex = 0;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.Add(this.treeView1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.TreeView treeView1;
    }
}