如何根据Excel搜索结果填充DataGridView并从DataGridView中删除空白标题?

时间:2019-03-19 10:04:38

标签: c# winforms datagridview

我有1个带有1个TextBox的表单,用户将在其中键入ProductId(FCID),然后按Enter键,然后,基于此,我要用搜索结果填充DataGridView。

这里有2个问题:

  • 如何根据用户输入的FCID从Excel过滤记录?

  • 从Excel绑定数据源时,如何如第二幅图像所示删除空白记录?

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代码:

private void txtProductId_KeyUp(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
    {
        string pathName = txtFilePath.Text;
        string fileName = System.IO.Path.GetFileNameWithoutExtension(txtFilePath.Text);
        DataTable tbContainer = new DataTable();
        string strConn = string.Empty;
        string sheetName = fileName;

        FileInfo file = new FileInfo(pathName);
        if (!file.Exists) { throw new Exception("Error, file doesn't exists!"); }
        string extension = file.Extension;

        switch (extension)
        {
            case ".xls":
                strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathName + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";
                break;
            case ".xlsx":
                strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + pathName + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1;'";
                break;
            default:
                strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathName + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";
                break;
        }
        OleDbConnection cnnxls = new OleDbConnection(strConn);
        OleDbDataAdapter oda = new OleDbDataAdapter(string.Format("select * from [{0}$]", sheetName), cnnxls);
        oda.Fill(tbContainer);
        grdProductList.DataSource = tbContainer;
        e.Handled = true;
    }
}

我以前没有在Windows窗体上工作过。

1 个答案:

答案 0 :(得分:1)

您可以指定包含要检索的数据的单元格范围。格式:

[sheet1$[Start Cell]:[End Cell]]

根据您的情况,您可以更改查询,仅将单元格从B6更改为ZZ(这似乎是包含数据的范围。请根据需要对其进行调整):
切记处置创建的一次性对象,或在using块中声明它们)

string sheetName = "Sheet1";
string query = $"SELECT * FROM [{sheetName}$B6:ZZ]"
OleDbDataAdapter oda = new OleDbDataAdapter(query, cnnxls); 
//(...)
oda.Dispose();

您当然可以指定一个过滤器:

int fieldID = 204;
//
string query = $"SELECT * FROM [{sheetName}$B6:ZZ] WHERE FCID = {fieldID}"

using (OleDbConnection cnnxls = new OleDbConnection(strConn))
using (OleDbDataAdapter oda = new OleDbDataAdapter(query, cnnxls))
{
    oda.Fill(tbContainer);
    grdProductList.DataSource = tbContainer;
}

或范围过滤器:

string query = $"SELECT * FROM [{sheetName}$B6:ZZ] WHERE FCID BETWEEN 204 AND 300"

或使用变量值:

int minValue = 204;
int maxValue = 300;
string query = $"SELECT * FROM [{sheetName}$B6:ZZ] WHERE FCID BETWEEN {minValue} AND {maxValue}"

.xls格式不支持通用范围:

[sheet1$B6:ZZ]
接受 [sheet1$B6:O65535] :数据在B6:O*列范围内。

更新 :(特定于此问题):

鉴于Excel工作表的组成,需要明确指定字段名称,否则生成的DataTable将包含空列:

int fieldID = 204;    
string fieldSelector = "[ FCID], [Product Name], [Category], [Sub Category], " +
                       "[Brand], [MRP], [Disc %], [Stock], [Discount Type]";

query = $"SELECT {fieldSelector} FROM [{sheetName}$B6:O65535] WHERE [ FCID] = {fieldID}";