我可以向后浏览Visual C#中的字符串吗?
发布时间:2020-12-15 21:00:27 所属栏目:百科 来源:网络整理
导读:我有一个搜索功能,我可以从文本的开头到结尾搜索我的richtextbox中的字符串.当我发现最后一个从它开始的时候开始. 这里的代码: #region Search private void txtSearch_KeyPress(object sender,KeyPressEventArgs e) { start = 0; end = 0; } //Searchfield
我有一个搜索功能,我可以从文本的开头到结尾搜索我的richtextbox中的字符串.当我发现最后一个从它开始的时候开始.
这里的代码: #region Search private void txtSearch_KeyPress(object sender,KeyPressEventArgs e) { start = 0; end = 0; } //Searchfield private void toolStripTextBoxSearch_Click(object sender,EventArgs e) { }//end TextBoxSearch public int FindMyText(string txtToSearch,int searchStart,int searchEnd) { // Set the return value to -1 by default. int retVal = -1; // A valid starting index should be specified. if (searchStart >= 0) { // A valid ending index if (searchEnd > searchStart || searchEnd == -1) { // Find the position of search string in RichTextBox indexOfSearchText = richTextBox.Find(txtToSearch,searchStart,searchEnd,RichTextBoxFinds.None); // Determine whether the text was found in richTextBox1. if (indexOfSearchText != -1) { // Return the index to the specified search text. retVal = indexOfSearchText; } } } return retVal; }//end FindMyText private void buttonSearch_left_Click(object sender,EventArgs e) { } private void buttonSearch_right_Click(object sender,EventArgs e) { int startindex = 0; if (txtSearch.Text.Length > 0) { startindex = FindMyText(txtSearch.Text,start,richTextBox.Text.Length); } // If string was not found report it if (startindex < 0 ) { if (stringfoundflag==1) { startindex = FindMyText(txtSearch.Text,richTextBox.Text.Length); //Start at Pos. 0 } else { MessageBox.Show("Not found in Textfield","Search",MessageBoxButtons.OK,MessageBoxIcon.Information); } }//end if if (startindex >= 0) { stringfoundflag = 1; // Set the highlight color as red //richTextBox.SelectionColor = Color.Red; // Find the end index. End Index = number of characters in textbox int endindex = txtSearch.Text.Length; // Highlight the search string richTextBox.Select(startindex,endindex); // mark the start position after the position of // last search string start = startindex + endindex; } } // Reset the richtextbox when user changes the search string private void textBox1_TextChanged(object sender,EventArgs e) { start = 0; indexOfSearchText = 0; } private void txtSearch_Enter(object sender,EventArgs e) { if (txtSearch.Text == "Search") { txtSearch.Text = ""; } } private void txtSearch_Leave(object sender,EventArgs e) { if (txtSearch.Text == "") { txtSearch.Text = "Search"; } } #endregion 我有两个按钮,一个搜索右边,一个左边,右边的工作就像开头的描述. 题: 我可以使用我的解决方案从按钮向右反转搜索功能,还是必须更改整个搜索功能? 示例:首先按照并跳转到最后一次,然后是倒数第二次,依此类推. 解决方法
嗨,我发现我的问题的解决方案,我希望有人可以帮助这个.
码: public int FindMyTextleft(string txtToSearch,RichTextBoxFinds.Reverse); // Determine whether the text was found in richTextBox1. if (indexOfSearchText != -1) { // Return the index to the specified search text. retVal = indexOfSearchText; } } }//end FindMyTextleft return retVal; }//end FindMyText private void buttonSearch_left_Click(object sender,EventArgs e) { int startindex = 0; if (txtSearch.Text.Length > 0 & stringfoundflag == 1) { startindex = FindMyTextleft(txtSearch.Text,startindex,end); } else if (txtSearch.Text.Length > 0) { startindex = FindMyTextleft(txtSearch.Text,richTextBox.Text.Length); } // If string was not found report it if (startindex < 0) { if (stringfoundflag == 1) { startindex = FindMyTextleft(txtSearch.Text,richTextBox.Text.Length); //Start at Pos. 0 } else { MessageBox.Show("Not found in Textfield",MessageBoxIcon.Information); } }//end if if (startindex >= 0) { stringfoundflag = 1; // Set the highlight color as red //richTextBox.SelectionColor = Color.Red; // Find the end index. End Index = number of characters in textbox int endindex = txtSearch.Text.Length; // Highlight the search string richTextBox.Select(startindex,endindex); // mark the start position after the position of // last search string end = startindex; } }//buttonSearch_left_Click 友好的祝福嗅探 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |
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