打開app.config文件，在“startup”節點一個“useLegacyV2RuntimeActivationPolicy="true"”屬性

代碼如下:
<startup useLegacyV2RuntimeActivationPolicy="true">
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>

在Form1窗體中，從工具箱拖出一個Crystal Report Viewer控件，雙擊Form窗體，是雙擊Form窗體，不是Crystal Report Viewer，在后臺的Form_Load事件中寫入如下代碼：

代碼如下:
private void Form1_Load(object sender, EventArgs e)
        {
            string connStr = "Data Source=.//SqlExpress;Initial Catalog=dbTest;User ID=sa;Password=test";
            SqlConnection conn = new SqlConnection(connStr);
            conn.Open();
            try
            {
                string sql = "SELECT * FROM Customer where email!='test@gmail.com'";
                SqlDataAdapter sda = new SqlDataAdapter(sql, conn);
                DataSet ds = new DataSet();
                sda.Fill(ds, "tmpTable");

                string reportPath = System.Windows.Forms.Application.StartupPath + @"/CrystalReport1.rpt";
                ReportDocument rd = new ReportDocument();
                rd.Load(reportPath);
                rd.SetDataSource(ds.Tables[0].DefaultView);
                this.crystalReportViewer1.ReportSource = rd;
            }
            catch (Exception ex)