添加特定列 c# datagridview

Question

我已经创建了 table 供应商 1`创建 table 供应商 1（

>  sup_id NUMBER(20) PRIMARY KEY,  sup_name VARCHAR2(40),  sup_address
> varchar2(50),  sup_phone NUMBER(15))

;

并插入值 `

> INSERT  INTO suppliers1 (SUP_ID,SUP_NAME,SUP_ADDRESS,SUP_PHONE) VALUES
> (100,'PPS','Bds',99545414); INSERT  INTO suppliers1
> (SUP_ID,SUP_NAME,SUP_ADDRESS,SUP_PHONE) VALUES
> (200,'Abcd','Dhaka',0295469); INSERT  INTO suppliers1
> (SUP_ID,SUP_NAME,SUP_ADDRESS,SUP_PHONE) VALUES
> (300,'Xyz','Ctg',0896547556);

我使用以下命令加载数据

>  OleDbDataAdapter adp = new OleDbDataAdapter("SELECT * FROM
> suppliers1", con);
>             DataTable dt = new DataTable();
>             adp.Fill(dt);
>             dataGridView1.DataSource = dt;

但我想以编程方式添加特定列，例如 sup_id 或 sup_name 等，我已经尝试了代码但失败了怎么可能？

String testValue2 = (String)dataGridView1["sup_id", 4]value;

Answer 1

datagridView1.Columns.Add(...)

有几个选项，制作字符串列最简单的就是提供名称。您还可以提供一个类型，或者您可以创建一个 DataGridViewColumn 实例并将其传入，以获得最大的灵活性

这是文档：https://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.columns(v=vs.110).aspx

Answer 2

试试简单的代码

 OleDbDataAdapter adp = new OleDbDataAdapter("SELECT * FROM suppliers1", con);
            DataTable dt = new DataTable();
            adp.Fill(dt);
            dataGridView1.AutoGenerateColumns = false;
            dataGridView1.ColumnCount = 2;// you can add more
            dataGridView1.Columns[0].HeaderText = "Sup Id";
            dataGridView1.Columns[0].DataPropertyName = "sup_id";
            dataGridView1.Columns[1].HeaderText = "Sup Name";
            dataGridView1.Columns[1].DataPropertyName = "sup_name";
            dataGridView1.DataSource = dt;

添加特定列 c# datagridview

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