Question

我正在使用DataTable来填充DataGridView进行搜索/过滤。

DataGridView显示实际的数据库列名称。

但是我想更改那些列名。例如tbl_Users的一列标签为LocalNo，我想更改为Unit No.

这是我的代码：

namespace FrequencyBook
{
public partial class Form11 : Form
{
    private static Form11 alreadyOpened = null;
    public Form11()
    {
        InitializeComponent();
        {
            if (alreadyOpened != null && !alreadyOpened.IsDisposed)

            {
                alreadyOpened.Focus();            // Bring the old one to top
                Shown += (s, e) => this.Close();  // and destroy the new one.
                return;
            }

            // Otherwise store this one as reference
            alreadyOpened = this;
        }
    }

    private DataTable dt = new DataTable();

    private void Form11_Load(object sender, EventArgs e)
    {
        dataGridView11.DataSource = GetSearchForm();
    }


    private DataTable GetSearchForm()
    {
        string connString = ConfigurationManager.ConnectionStrings["FrequencyBook.Properties.Settings.db_FrequenciesConnectionString"].ConnectionString;

        using (OleDbConnection conn = new OleDbConnection(connString))

        {
            using (OleDbCommand cmd = new OleDbCommand("Select * FROM tbl_Users", conn))

            {
                conn.Open();
                OleDbDataReader reader = cmd.ExecuteReader();
                dt.Load(reader);
            }
        }

        return dt;
    }

    private void closeFormToolStripMenuItem_Click(object sender, EventArgs e)
    {
        this.Close();
    }

    private void resetFormToolStripMenuItem_Click(object sender, EventArgs e)
    {
        tboxSearchLicensee.Clear();
        tboxSearchCallsign.Clear();
        tboxSearchLocation.Clear();
        tboxSearchBand.Clear();
        tboxSearchRID.Clear();
        tboxSearchLocalNo.Clear();
    }

    private void tboxSearchLicensee_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = "Licensee LIKE '%" + tboxSearchLicensee.Text + "%'" ;
    }

    private void tboxSearchCallsign_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = "Callsign LIKE '%" + tboxSearchCallsign.Text + "%'" ;
    }

    private void tboxSearchLocation_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = "Location LIKE '%" + tboxSearchLocation.Text + "%'" ;
    }

    private void tboxSearchBand_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = "Band LIKE '%" + tboxSearchBand.Text + "%'" ;
    }

    private void tboxSearchRID_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = string.Format("RID1 LIKE '%{0}%' OR RID2 LIKE '%{0}%' OR RID3 LIKE '%{0}%' OR RID4 LIKE '%{0}%'", tboxSearchRID.Text);

        //DataView dv = dt.DefaultView;
        //dv.RowFilter = "RID1 LIKE '%" + tboxSearchRID.Text + "%'" ;
    }

    private void tboxSearchLocalNo_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = "LocalNo LIKE '%" + tboxSearchLocalNo.Text + "%'" ;
    }

我在这里阅读了这篇文章： How to change the DataTable Column Name? 第一个答案对我来说很有意义，但是我不知道需要在哪里添加新行。我在几个地方都尝试过，但是不高兴。

Answer 1

这是我的新代码。它适用于标题/列名称的更改，但破坏了实际的搜索/过滤功能。实际上，我将新行改回了原来的名称，并让该表格再次起作用。有什么建议么？这是我的搜索/过滤器表单的屏幕截图： My search form

namespace FrequencyBook
{
public partial class Form11 : Form
{
    private static Form11 alreadyOpened = null;
    public Form11()
    {
        InitializeComponent();
        {
            if (alreadyOpened != null && !alreadyOpened.IsDisposed)

            {
                alreadyOpened.Focus();            // Bring the old one to top
                Shown += (s, e) => this.Close();  // and destroy the new one.
                return;
            }

            // Otherwise store this one as reference
            alreadyOpened = this;
        }
    }

    private DataTable dt = new DataTable();

    private void Form11_Load(object sender, EventArgs e)
    {
        dataGridView11.DataSource = GetSearchForm();
    }


    private DataTable GetSearchForm()
    {
        string connString = ConfigurationManager.ConnectionStrings["FrequencyBook.Properties.Settings.db_FrequenciesConnectionString"].ConnectionString;

        using (OleDbConnection conn = new OleDbConnection(connString))

        {
            using (OleDbCommand cmd = new OleDbCommand("Select * FROM tbl_Users", conn))

            {
                conn.Open();
                OleDbDataReader reader = cmd.ExecuteReader();
                dt.Load(reader);
            }
        }
        dt.Columns["ID"].ColumnName = "ID";
        dt.Columns["Licensee"].ColumnName = "Licensee";
        dt.Columns["Callsign"].ColumnName = "Callsign";
        dt.Columns["LocalNo"].ColumnName = "Unit";
        dt.Columns["Location"].ColumnName = "Location";
        dt.Columns["FreqBand"].ColumnName = "Band";
        dt.Columns["Email"].ColumnName = "Email";
        dt.Columns["Phone"].ColumnName = "Phone";
        dt.Columns["RID1"].ColumnName = "RID1";
        dt.Columns["RID2"].ColumnName = "RID2";
        dt.Columns["RID3"].ColumnName = "RID3";
        dt.Columns["RID4"].ColumnName = "RID4";
        dt.Columns["Notes"].ColumnName = "Notes";

        return dt;
    }

    private void closeFormToolStripMenuItem_Click(object sender, EventArgs e)
    {
        this.Close();
    }

    private void resetFormToolStripMenuItem_Click(object sender, EventArgs e)
    {
        tboxSearchLicensee.Clear();
        tboxSearchCallsign.Clear();
        tboxSearchLocation.Clear();
        tboxSearchBand.Clear();
        tboxSearchRID.Clear();
        tboxSearchLocalNo.Clear();
    }

    private void tboxSearchLicensee_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = "Licensee LIKE '%" + tboxSearchLicensee.Text + "%'" ;
    }

    private void tboxSearchCallsign_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = "Callsign LIKE '%" + tboxSearchCallsign.Text + "%'" ;
    }

    private void tboxSearchLocation_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = "Location LIKE '%" + tboxSearchLocation.Text + "%'" ;
    }

    private void tboxSearchBand_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = "Band LIKE '%" + tboxSearchBand.Text + "%'" ;
    }

    private void tboxSearchRID_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = string.Format("RID1 LIKE '%{0}%' OR RID2 LIKE '%{0}%' OR RID3 LIKE '%{0}%' OR RID4 LIKE '%{0}%'", tboxSearchRID.Text);

        //DataView dv = dt.DefaultView;
        //dv.RowFilter = "RID1 LIKE '%" + tboxSearchRID.Text + "%'" ;
    }

    private void tboxSearchLocalNo_TextChanged(object sender, EventArgs e)
    {
        DataView dv = dt.DefaultView;
        dv.RowFilter = "Unit LIKE '%" + tboxSearchLocalNo.Text + "%'" ;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        //This button has changed to btnReturnToUsers
        this.Hide();//Hide the 'current' form,  form11 
                    //show another form ( form12 )   
        Form12 frm = new Form12();
        frm.ShowDialog();
        //Close the form.(form11)
        this.Close();
    }

    private void btnReturnToMain_Click(object sender, EventArgs e)
    {
        this.Hide();//Hide the 'current' form,  form11 
                    //show another form ( form2 )   
        Form2 frm = new Form2();
        frm.ShowDialog();
        //Close the form.(form11)
        this.Close();
    }
}

}

如何将数据表Fed的标题名称/列名称更改为dataGridView

1 个答案: