C# 通过从组合框中选择任何表来填充datagridview

我使用以下代码在combobox中显示SQL db表的名称。现在，当我从组合框中单击这些表名时，我想让DataGridView填充该表的内容

我的数据库中有三个表

private void Form1_Load(object sender, EventArgs e)
    {
        String strConnection = "Data Source=HP\\SQLEXPRESS;database=MK;Integrated Security=true";

        SqlConnection con = new SqlConnection(strConnection);
        try
        {

            con.Open();

            SqlCommand sqlCmd = new SqlCommand();

            sqlCmd.Connection = con;
            sqlCmd.CommandType = CommandType.Text;
            sqlCmd.CommandText = "Select table_name from information_schema.tables";

            SqlDataAdapter sqlDataAdap = new SqlDataAdapter(sqlCmd);

            DataTable dtRecord = new DataTable();
            sqlDataAdap.Fill(dtRecord);
            comboBox1.DataSource = dtRecord;
            comboBox1.DisplayMember = "TABLE_NAME";
            con.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }
    private void PopulateGridView(string tablename)
    {
        String strConnection = "Data Source=HP\\SQLEXPRESS;database=MK;Integrated Security=true";

        SqlConnection con = new SqlConnection(strConnection);
        try
        {

            con.Open();

            SqlCommand sqlCmd = new SqlCommand();

            sqlCmd.Connection = con;
            sqlCmd.CommandType = CommandType.Text;
            sqlCmd.CommandText = "Select * from " + tablename;

            SqlDataAdapter sqlDataAdap = new SqlDataAdapter(sqlCmd);

            DataTable dtRecord = new DataTable();
            sqlDataAdap.Fill(dtRecord);
            dataGridView1.DataSource = dtRecord;

            con.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }


    private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (comboBox1.SelectedValue != null)
        {
            PopulateGridView(comboBox1.SelectedValue.ToString());
        }

    }
}

}

这是我的桌子

rahul   sharma  12-1-2011
suresh  chand   23-4-2012
prachi  shukla  13-2-2011
siddharth   malhotra    25-9-2012
saina   chopra  12-8-2011
amit    mehta   20-3-2012

---

订阅组合框的SelectedIndexChanged事件，并从组合框中检索所选表名。从那里，运行查询从表中检索记录，并将结果绑定到datagridview

样本：

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    String strConnection = "Data Source=HP\\SQLEXPRESS;database=MK;Integrated Security=true";

    SqlConnection con = new SqlConnection(strConnection);
    con.Open();

    string tableName = comboBox1.SelectedText;

    SqlCommand sqlCmd = new SqlCommand();
    sqlCmd.Connection = con;
    sqlCmd.CommandType = CommandType.Text;
    sqlCmd.CommandText = "Select * from " + tableName;

    SqlDataAdapter sqlDataAdap = new SqlDataAdapter(sqlCmd);

    DataTable dtRecord = new DataTable();
    sqlDataAdap.Fill(dtRecord);
    dgv.DataSource = dtRecord;
    con.Close();
}

---

您将在combobox上选择一个事件IndexChange并将表名传递给您的函数

private void ComboBox1_SelectedIndexChanged(object sender, System.EventArgs e)
{
   RebindGridView(ComboBox1.SelectedValue);
}

然后在您的函数中：

private void RebindGridView(string tablename)
{
  String strConnection = "Data Source=HP\\SQLEXPRESS;database=MK;Integrated Security=true";

            SqlConnection con = new SqlConnection(strConnection);
            try
            {

                con.Open();

                SqlCommand sqlCmd = new SqlCommand();

                sqlCmd.Connection = con;
                sqlCmd.CommandType = CommandType.Text;
                sqlCmd.CommandText = "Select * from " + tablename;

                SqlDataAdapter sqlDataAdap = new SqlDataAdapter(sqlCmd);

                DataTable dtRecord = new DataTable();
                sqlDataAdap.Fill(dtRecord);
                gridview1.DataSource = dtRecords;
                 gridview1.DataBind();
                con.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
}

---

那么问题是什么呢？问题是wat将是用我从组合框中选择的表格内容填充我的dgv的代码谢谢..但是请你写代码..我是c的新手..请看我的编辑。此外，您可能希望通过创建用于从数据库检索记录的不同类来分隔数据层。它在sqlDataAdap.FilldtRecord；上显示了一个错误；。。。。“from”附近的语法不正确。请确保选择的组合框项不是空的。它可能会抛出该语法，因为组合框中的选定项为空。会出现什么错误？还可以看到我的编辑忘记了from和tablename之间的空格…现在它是正确的。我需要在哪里定义数据绑定？数据绑定是gridview的方法，您不需要定义它。分配数据源后，您需要绑定它。。。请参见此处抱歉，但我仍然不明白..我不擅长编程..请帮助抱歉，正确的错误描述是-'System.Windows.Forms.DataGridView'不包含'DataBind'的定义，并且没有扩展方法'DataBind'接受类型为'System.Windows.Forms.DataGridView'的第一个参数。是否缺少使用指令还是程序集引用？