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我試圖爲用戶在文本框(tbPartNum)中輸入文本時實現搜索功能,然後單擊「查找」按鈕,然後搜索dataGridView1中的單元格,一旦找到它,它會突出顯示整行黃色。我的代碼如下,顯然不工作它會拋出一個錯誤,指出「NullReferenceException未處理」,並在其下面「對象引用未設置爲對象的實例。」在dataGridView的單元格中搜索文本並突出顯示該行?
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
namespace GBstock
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
// populate the dataGridView with the Excel File
string connectionString = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 8.0;HDR=YES;IMEX=1;""", @"C:\Documents and Settings\rghumra\Desktop\Visual Studio\GBstock\GBstock\bin\Debug\FORM TEST.xlsx");
string query = String.Format("select * from [{0}$]", "Sheet1");
OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, connectionString);
DataSet dataSet = new DataSet();
dataAdapter.Fill(dataSet);
dataGridView1.DataSource = dataSet.Tables[0];
// populates the comboBox (cbSuppList) with all column headers
foreach (DataGridViewColumn col in dataGridView1.Columns)
{
cbSuppList.Items.Add(col.HeaderText);
}
}
private void btnFind_Click(object sender, EventArgs e)
{
// Code to search the alphanumneric Part Number (in Column1 header called "PART NUMBER") and highlihgt the row
foreach (DataGridViewRow row in dataGridView1.Rows)
{
if (row.Cells["PART NUMBER"].Value.ToString().Equals(tbPartNum.Text))
{
dataGridView1.Rows[row.Index].DefaultCellStyle.BackColor = Color.Yellow;
}
}
}
private void fileToolStripMenuItem_Click(object sender, EventArgs e)
{
Instructions instructionForm = new Instructions();
instructionForm.Show();
}
private void partToolStripMenuItem_Click(object sender, EventArgs e)
{
NewPart newPartForm = new NewPart();
newPartForm.Show();
}
private void supplierToolStripMenuItem_Click(object sender, EventArgs e)
{
NewSupplier newSuppForm = new NewSupplier();
newSuppForm.Show();
}
}
}
@jimm_keen - 謝謝你的解釋THI爲好,它的作品完美。 – Rg786 2012-03-06 23:32:53