从C#和ADO.NET创建Crystal报表

如何解决从C#和ADO.NET创建Crystal报表

| 我需要从我的员工数据库项目中创建一个水晶报表,这意味着每当我单击“报表”按钮时,都会生成该所选员工的报表并显示给用户,该怎么做?这是我的代码
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;
using System.Data.SqlClient;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
    public Form1()
    {
        MessageBox.Show(\"Welcome To Employee Database!\",\"Welcome\",MessageBoxButtons.OK,MessageBoxIcon.Information);
        InitializeComponent();
    }
    string flag;
    SqlConnection a = new SqlConnection(\"Data Source=PRISLOGI-57EEC\\\\SQLEXPRESS;Initial Catalog=mydb;Integrated Security=True\");
    SqlCommand cmd = new SqlCommand();
    SqlDataAdapter da = new SqlDataAdapter();
    DataSet ds = new DataSet();
    BindingSource bs = new BindingSource();

    private void button1_Click(object sender,EventArgs e)
    {
        try
        {

            a.Open();
            da.InsertCommand = new SqlCommand(\"Insert into tbl1 (ID,FirstName,LastName) values (@id,@fn,@ln)\",a);
            da.InsertCommand.Parameters.AddWithValue(\"@id\",textBox1.Text);
            da.InsertCommand.Parameters.AddWithValue(\"@fn\",textBox2.Text);
            da.InsertCommand.Parameters.AddWithValue(\"@ln\",textBox3.Text);
            //da.SelectCommand = new SqlCommand(\"SELECT * FROM tbl1\",a);
            da.InsertCommand.ExecuteNonQuery();

            ds.Clear();
            da.Fill(ds,\"tbl1\");
            dataGridView1.DataSource = ds.Tables[\"tbl1\"];





            flag = \"1\";
            if (flag == \"1\")
            {
                MessageBox.Show(\"Data inserted\");
                Reset();
            }
            a.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(\"Data cannot insert\" + ex);
        }


    }

    private void button2_Click(object sender,EventArgs e)
    {
        try
        {
        a.Open();

        da.InsertCommand = new SqlCommand(\"UPDATE tbl1 SET FirstName = @fn,LastName = @ln WHERE ID = @id\",a);
        da.InsertCommand.Parameters.AddWithValue(\"@id\",textBox1.Text);
        da.InsertCommand.Parameters.AddWithValue(\"@fn\",textBox2.Text);
        da.InsertCommand.Parameters.AddWithValue(\"@ln\",textBox3.Text);
        //da.SelectCommand = new SqlCommand(\"SELECT * FROM tbl1\",a);
        da.InsertCommand.ExecuteNonQuery();

        ds.Clear();
        da.Fill(ds,\"tbl1\");
        dataGridView1.DataSource = ds.Tables[\"tbl1\"];





            a.Close();
            flag = \"1\";
            if (flag == \"1\")
            {
                MessageBox.Show(\"Data updated\");
                Reset();
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(\"Data cannot update\" + ex);
        }
    }

    private void button3_Click(object sender,EventArgs e)
    {
        try
        {
        a.Open();




        da.InsertCommand = new SqlCommand(\"DELETE FROM tbl1 WHERE ID = @id\",textBox1.Text);




        if ((MessageBox.Show(\"are you sure u want to delete\",\"Delete\",MessageBoxButtons.YesNo,MessageBoxIcon.Question) == DialogResult.Yes))
        {
            //da.SelectCommand = new SqlCommand(\"SELECT * FROM tbl1\",\"tbl1\");
            dataGridView1.DataSource = ds.Tables[\"tbl1\"];

            flag = \"1\";
            if (flag == \"1\")
            {
                MessageBox.Show(\"Data deleted\");
                Reset();
            }

        }
        a.Close();


        }
        catch (Exception ex)
        {
            MessageBox.Show(\"Data cannot delete\" + ex);
        }

    }

    private void button4_Click(object sender,EventArgs e)
    {
        a.Open();
        da.SelectCommand = new SqlCommand(\"SELECT * FROM tbl1\",a);
        da.SelectCommand.ExecuteNonQuery();
        a.Close();
        ds.Clear();
        da.Fill(ds,\"tbl1\");
        dataGridView1.DataSource = ds.Tables[\"tbl1\"];

        bs.DataSource = ds.Tables[\"tbl1\"];
        textBox1.DataBindings.Add(new Binding(\"Text\",bs,\"ID\"));
        textBox2.DataBindings.Add(new Binding(\"Text\",\"FirstName\"));
        textBox3.DataBindings.Add(new Binding(\"Text\",\"LastName\"));

    }

    public void Reset()
    {
        textBox1.Text =
            textBox2.Text =
            textBox3.Text = string.Empty;
    }

    private void button5_Click(object sender,EventArgs e)
    {
        bs.MoveNext();
        selectRow();

    }

    private void button6_Click(object sender,EventArgs e)
    {
        bs.MovePrevious();
        selectRow();
    }

    private void button7_Click(object sender,EventArgs e)
    {
        bs.MoveFirst();
        selectRow();
    }

    private void button8_Click(object sender,EventArgs e)
    {
        bs.MoveLast();
        selectRow();
    }

    public void selectRow()
    {
        dataGridView1.ClearSelection();
        dataGridView1.Rows[bs.Position].Selected = true;
    }

    private void label4_Click(object sender,EventArgs e)
    {

    }

}
}     

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