Question

我试图读取excel文件的内容（我必须处理数据不显示它），但行数是0.我确实在UI中显示了数据，行没有显示。有一个数字。

string src = "the path;";
OleDbConnection con = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + src +
                                       "Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"");

OleDbDataAdapter da = new OleDbDataAdapter("select * from [RENNES4_wk13$]", con);

DataSet ds = new DataSet();
da.Fill(ds);
DataGridView dgv = new DataGridView();
dgv.DataSource = ds.Tables[0];
int rows = dgv.Rows.Count;
int cells = dgv.Rows[0].Cells.Count;//ArgumentOutOfRange why?

我该如何解决？

Answer 1

试试这个

        string src = @"C:\SampleData\us-500.xls";
        OleDbConnection con = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + src +
                                          ";Extended Properties=Excel 8.0;");

        //con.Open();
        OleDbDataAdapter da = new OleDbDataAdapter("select * from [MySheet$]", con);
        DataSet ds = new DataSet();
        da.Fill(ds);

        BindingSource bindingSource = new BindingSource();
        bindingSource.DataSource = ds.Tables[0];

        var dataGridView1 = new DataGridView();

        // Add data grid view as child control on form, flow Layout Panel is placed on windows form 
        flowLayoutPanel1.Controls.Add(dataGridView1);

        dataGridView1.DataSource = bindingSource;
        int rows = dataGridView1.Rows.Count;
        int cells = dataGridView1.Rows[0].Cells.Count;

Answer 2

试试这个：

BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = resultDt;

在你的情况下：

bindingSource.DataSource = ds.Tables[0];

和

dgResult.DataSource = bindingSource;
flowLayoutPanel.Controls.Add(dgResult); 

var c = dgResult.Rows.Count;

绑定源是负责将数据与控件同步的原因。您想要使用它，而不是尝试将表直接分配给控件。

参考：

Datagridview rowcount showing 0 even when there is a valid datasource

DataGridView.Rows.Count为0

2 个答案: