데이터그리드뷰 읽기
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01-07-2019 - |
문제
데이터 테이블에서 DataGridview를 채웠습니다.애플리케이션이 실행 중일 때 DataGridview에서 어떻게 읽나요?
해결책
어떻게 채웠나요?DataSource가 BindlingList처럼 유용한가요?그렇다면 다음과 같습니다.
BindingSource bindingSource = this.dataGridView1.DataSource as BindingSource;
//substitute your business object type for T
T entity = bindingSource.Current as T;
행에 바인딩된 엔터티를 얻을 수 있습니다.
그렇지 않으면 항상 datagridview.Columns[n].Cells[n].Value가 있지만 실제로는 DataSource의 개체를 사용하는 방법을 살펴보겠습니다.
편집하다:아...데이터 테이블...맞아요:
var table = dataGridView1.DataSource as DataTable;
foreach(DataRow row in table.Rows)
{
foreach(DataColumn column in table.Columns)
{
Console.WriteLine(row[column]);
}
}
다른 팁
DataGridview를 반복하고 각 셀을 검색할 수 있습니다.
for(int i =0; i < DataGridView.Rows.Count; i++){
DataGridView.Rows.Columns["columnName"].Text= "";
}
예가 있습니다 여기.
당신은 살펴보고 싶을 수도 있습니다 DataTable.WriteXml, 그리고 동생이에요 DataTable.ReadXml.DataTable을 번거롭게 저장할 필요가 없습니다.
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public static DataTable objDataTable = new DataTable("UpdateAddress");
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Stream myStream = null;
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.InitialDirectory = "c:\\";
openFileDialog1.Filter = "csv files (*.csv)|*.txt|All files (*.*)|*.*";
openFileDialog1.FilterIndex = 2;
openFileDialog1.RestoreDirectory = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
try
{
if ((myStream = openFileDialog1.OpenFile()) != null)
{
string fileName = openFileDialog1.FileName;
List<string> dataFile = new List<string>();
dataFile = ReadList(fileName);
foreach (string item in dataFile)
{
string[] temp = item.Split(',');
DataRow objDR = objDataTable.NewRow();
objDR["EmployeeID"] = temp[0].ToString();
objDR["Street"] = temp[1].ToString();
objDR["POBox"] = temp[2].ToString();
objDR["City"] = temp[3].ToString();
objDR["State"] = temp[4].ToString();
objDR["Zip"] = temp[5].ToString();
objDR["Country"] = temp[6].ToString();
objDataTable.Rows.Add(objDR);
}
}
}
catch (Exception ex)
{
MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);
}
}
}
public static List<string> ReadList(string filename)
{
List<string> fileData = new List<string>();
StreamReader sr = new StreamReader(filename);
while (!sr.EndOfStream)
fileData.Add(sr.ReadLine());
return fileData;
}
private void Form1_Load(object sender, EventArgs e)
{
objDataTable.Columns.Add("EmployeeID", typeof(int));
objDataTable.Columns.Add("Street", typeof(string));
objDataTable.Columns.Add("POBox", typeof(string));
objDataTable.Columns.Add("City", typeof(string));
objDataTable.Columns.Add("State", typeof(string));
objDataTable.Columns.Add("Zip", typeof(string));
objDataTable.Columns.Add("Country", typeof(string));
objDataTable.Columns.Add("Status", typeof(string));
dataGridView1.DataSource = objDataTable;
dataGridView1.Refresh();
}
private void button2_Click(object sender, EventArgs e)
{
// Displays a SaveFileDialog so the user can save the backup of AD address before the update
// assigned to Button2.
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.Filter = "BAK Files|*.BAK";
saveFileDialog1.Title = "Save AD Backup";
saveFileDialog1.ShowDialog();
if (saveFileDialog1.FileName != "")
{
TextWriter fileOut = new StreamWriter(saveFileDialog1.FileName);
//This is where I want read from the datagridview the EmployeeID column and use it in my BackupAddress method.
}
}
제휴하지 않습니다 StackOverflow