如何使用 C# 在 datagridview 控件中显示某些表架构列？答案

【问题标题】：How to display certain table schema columns in a datagridview control using C#?如何使用 C# 在 datagridview 控件中显示某些表架构列？
【发布时间】：2015-06-24 14:26:41
【问题描述】：

我有一种方法可以将 MS Access 表的整个架构显示到 datagridview 控件中。我如何才能在 datagridview 中仅显示列名和数据类型架构列。我正在使用的方法如下。谢谢你的建议。

private void ButtonFieldHelp_Click(object sender, EventArgs e)
{
    char ch = '"';

    dbConn = new OleDbConnection();
    dbCmd = new OleDbCommand();
    DataTable data; 
    OleDbDataReader reader; 

    dbConn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + ch + this.stringData + ch;
    dbConn.Open();
    dbCmd.Connection = dbConn;
    dbCmd.CommandText = "SELECT * FROM " + this.comboBox.SelectedItem.ToString();
    reader = dbCmd.ExecuteReader(); 

    foreach (DataRow tableField in data.Rows)
    {
        foreach (DataColumn tableProperty in data.Columns)
        {
            dataGridView.DataSource = data;
        }
    }
    this.txtRecords.Text = data.Rows.Count.ToString();

    reader.Close();
    dbConn.Close();
}

【问题讨论】：

标签： c# ms-access datagridview schema sqldatatypes

【解决方案1】：

这里是您的代码修改为使用 OleDbDataAdapter 按您的需要工作：

 private void ButtonFieldHelp_Click(object sender, EventArgs e)
    {
        char ch = '"';

        var dbConn = new OleDbConnection();
        var dbCmd = new OleDbCommand();
        DataTable data = new DataTable();
        OleDbDataReader reader;

        dbConn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + ch + this.stringData + ch;
        dbConn.Open();
        dbCmd.Connection = dbConn;
        dbCmd.CommandText = "SELECT * FROM " + this.comboBox.SelectedItem.ToString();
        //reader = dbCmd.ExecuteReader();

        OleDbDataAdapter adapter = new OleDbDataAdapter(dbCmd);
        adapter.Fill(data);


        var dataTable = new DataTable();
        dataTable.Columns.Add("ColumnName");
        dataTable.Columns.Add("ColumnType");

        foreach (DataColumn column in data.Columns)
        {
            dataTable.Rows.Add(column.ColumnName, column.DataType.ToString());
        }

        this.dataGridView1.DataSource = dataTable;

        this.txtRecords.Text = data.Rows.Count.ToString();

        dbConn.Close();
    }

【讨论】：