WinForm 2.0 textBox作为参数的查询，显示在DataGridView

cs文件内容:

    private void GetData()
        {
            try
            {
                // Specify a connection string. Replace the given value with a
                // valid connection string for a Northwind SQL Server sample
                // database accessible to your system.
                String connectionString =
                    "Integrated Security=SSPI;Persist Security Info=False;" +
                    "Initial Catalog=Northwind;Data Source=localhost";
                SqlConnection connection = new SqlConnection(connectionString);

                // Create a DataSet.
                DataSet data = new DataSet();
                data.Locale = System.Globalization.CultureInfo.InvariantCulture;

                // Add data from the Customers table to the DataSet.
                string sql = "select * from Customers where CustomerID = '"+this.textBox1.Text+"'";
                SqlDataAdapter masterDataAdapter = new
                    SqlDataAdapter(sql, connection);
                masterDataAdapter.Fill(data, "Customers");

                this.dataGridView1.DataSource = data.Tables[0].DefaultView;
            }
            catch (SqlException)
            {
                MessageBox.Show("To run this example, replace the value of the " +
                    "connectionString variable with a connection string that is " +
                    "valid for your system.");
            }
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            GetData();
        }

Designer.cs文件内容

namespace WindowsApplication9
{
    partial class Form1
    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        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

        /// <summary>
        /// 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。
        /// </summary>
        private void InitializeComponent()
        {
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.dataGridView1 = new System.Windows.Forms.DataGridView();
            ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();
            this.SuspendLayout();
            //
            // textBox1
            //
            this.textBox1.Location = new System.Drawing.Point(3, 3);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(100, 21);
            this.textBox1.TabIndex = 0;
            this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
            //
            // dataGridView1
            //
            this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dataGridView1.Location = new System.Drawing.Point(3, 30);
            this.dataGridView1.Name = "dataGridView1";
            this.dataGridView1.RowTemplate.Height = 23;
            this.dataGridView1.Size = new System.Drawing.Size(409, 171);
            this.dataGridView1.TabIndex = 1;
            //
            // Form1
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(416, 206);
            this.Controls.Add(this.dataGridView1);
            this.Controls.Add(this.textBox1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.DataGridView dataGridView1;
    }
}